Alternatives to Kolab Now

Trumba is an innovative calendar publishing and event management software preferred by Higher Ed, K-12 Education, Healthcare, Community and Government organizations nationwide. Publish branded design-quality calendars; schedule, promote, and track events. Attendees can easily find events, register and stay informed of changes. Make your life easier too—by automating tedious event management tasks in one place (often eliminating the need for multiple event management platforms). Trumba offers a 30-day free trial (no credit card required) on their website. You'll see why Trumba is the preferred event management software for higher education, healthcare, community, and government organizations.

The best email client for Windows or macOS will boost your productivity and increase your email efficiency. eM Client is a fully featured email client that has a simple and clean interface. It offers features for tasks, calendars, online meetings, contacts, notes and chat. Schedule online meetings with integration with Zoom, MS Teams, Google Meet and more. Use cloud attachments to keep control over your files via Dropbox, Google Drive etc. eM Client is compatible with every email service that can use IMAP, POP or Exchange Web Services protocol. This email client is compatible with Google Workspace, Microsoft 365 Outlook, Exchange, and many more. eM Client improves email communication for both professionals, businesses and home users. It includes advanced features such as server-side search, instant message translation, "Snooze" and "Watch for replies", synchronized tags, and easy email encryption (PGP/S/MIME). Ensure privacy with automatic blocking of mail-tracking pixels. You can also customize the look and available features to make sure it works best for your specific needs - create your own theme or select one of the pre-set ones, customize your toolbar, shortcuts and message list.

ONLYOFFICE Docs is a secure online office suite that you get a vast range of collaborative features. Co-edit documents, spreadsheets, presentations, fillable forms and PDF files with your team in real-time: two co-editing modes (real-time and paragraph-locking), commenting, built-in chat, tracking changes, version history, document comparison. It can be integrated with existing platforms or used as a built-in component. ONLYOFFICE Workspace lets you deploy a web office on your own server. It comprises ONLYOFFICE Docs and comprehensive business tools: Mail, CRM, document and project management, calendar, chat, blogs, forums, polls, etc. Community Edition is the best choice for teams with up to 20 users, available free of charge. Enterprise Edition is for bigger businesses that need enhanced security options and professional support. ONLYOFFICE cloud service is a cost-efficient business solution with online editors and a collaboration platform, accessible from anywhere and from any device.

Business-class email and calendaring make it easier to work smarter. Exchange allows you to collaborate on critical documents and gives an organized inbox that prioritizes important messages. It adapts to your work style and adapts to your needs so you can get more done faster. Access to a personalized inbox with helpful features, a smarter way to view and interact via email and a smarter way to organize it. Search enhancements provide faster and more complete results. Add-ins allow for powerful customization and extensibility that connects you to modern services as well as internal line-of business applications. A calendaring system that does more than just schedule appointments and make commitments will help you organize your time. Automatically capture events such as hotel reservations and flights from email. Get suggestions based on where you are located about where to meet. Microsoft 365 offers many benefits that can help you and your company be more productive.

We offer a digitally sovereign solution that allows you to keep track of your e mails and calendars, organize your tasks, and stay in touch with colleagues via video conference. Kopano Groupware, an e-mailing and calendaring system that can be operated digitally sovereign, is available. It has similar functionality to Microsoft Outlook and Exchange. Kopano Groupware can be used with more than 100,000 users. Kopano Groupware provides users with e-mail and calendar access. It connects teams and allows them to communicate and share their organizational data across all devices. Data can be edited together in public folders, or shared with others using your own inbox.

We will not sell your data to anyone. We will never sell your data to anyone else. You will enjoy constant improvements thanks to a transparent and open-source community model that is free from lockins and paywalls. Open Web Systems is a collaboration of Collective Tools and The Open Co-op. It is managed by its members as cooperative. We are all working together to build a regenerative, commons-based economy. Your own, customizable, welcome screen that allows you to quickly link to your most important resources and tools. You can also search across all your files and applications simultaneously. You can create spreadsheets and documents, and collaborate with others via mobile, desktop, and web. Use powerful search to find files, share your thoughts and lock files until you are finished.

FullCalendar generates React virtualDOM nodes that you can use to leverage Fiber, React’s highly optimized rendering engine. FullCalendar's modular plug-ins can reduce the size of your project's bundle. Are you having trouble solving a difficult problem? You might try searching the documentation first. Try searching the documentation if you don't find what your looking for. If you are still having trouble finding the answer, post your question to the StackOverflow fullcalendar tag. If you are submitting a new question, please tag it with fullcalendar Are you interested in helping FullCalendar grow? FullCalendar has grown in popularity over the years, and there is still much to do. We appreciate any time and effort that you can contribute!

grommunio is a comprehensive solution for modern digital communication and collaboration. This includes the device- and operating-system-independent management of sensitive data, such as eMail, contacts, calendars, chats, video conferences, file sharing, and much more, in real-time. Using open source technology based upon Linux, grommunio meets the highest standards of security and is scalable. Grommunio's advanced architecture makes it easy to integrate into existing systems. Organize your emails, contacts and calendars with just one platform. Your data is instantly available on all your devices with Active Sync. Share files of any kind in grommunio Files and chat with your employees simultaneously via grommunio Chat.

Thunderbird is an email application that's free and easy to set up. It also has great features! Thunderbird is a free email application that makes email easier for you. It combines speed, privacy, and the most recent technologies. Keep your eyes on the important things and forget about the complexity. Multiple features such as remote content blocking and built-in Do Not Track all work together to protect your privacy and ensure your security. Thunderbird can be customized instantly with Add-ons (Extensions and Themes) and many other features. Thunderbird integrates with your Thunderbird email to allow you to organize your life and schedule. You can manage multiple calendars, add friends to events, and subscribe publicly to calendars. Thunderbird is an open-source project. This means that anyone can contribute ideas and code to the project.

XgenPlus is the most advanced enterprise email solution. Communicate and collaborate with it. It is the first IDN Email Server to provide EAI (Email Address Interization), i.e Linguistic Email Address, like (Email address written in Hindi). It is an email management software that can be used by any enterprise, SME, PSU, or government. department. It supports all the basic features like POP, IMAP and webmail, calendars, contacts, SMS, scheduling and security. Key Features IDN Email - The only internationalized domain name email hosting server Policy for auto archival and mail retention Merge / de-merge email account Group Mail with a Tracking Report Broadcast email Schedule Email / SMS & Other... Benefits: Reliable - 99.99% uptime Scalable: Flexible to meet the needs of your organization Robust Security: Inbuilt Antispam software Live Chat, On-Call, and Offline Support Available 24x7 Easy Data & Administrative Control Better Storage

Connect. Organize. Get things done. All your email, calendar, contacts, and tasks in one place. You can manage your email, calendar, contacts and tasks efficiently from one place. Office integration allows you to share attachments directly from OneDrive, access contacts, view LinkedIn profiles, and view LinkedIn profiles. You can book conference rooms and track RSVPs right from your calendar. You can share your calendars to coordinate and plan and see when your coworkers will be available. You can rest assured with enterprise-grade security that is trusted by the world's most important companies. Outlook protects your confidential information around the clock, and doesn't get in your way. Outlook anticipates your needs. Outlook automatically adds travel and bill payments to your calendar. Intelligent reminders help you stay on track. Search makes it easy to find the information you need quickly.

Spike integrates all your workspace into one Inbox. This includes email, chat and calendar, calls, team collaboration, tasks, calls, and even calls. You can now do your work in one feed so you don't have to switch between apps. Spike's conversational email merges traditional email with instant messaging, eliminating cluttered email threads. Live collaboration and real-time communication allow for better interactions and a more human communication environment. Spike is available for iOS, Android, Mac and Windows.

KumoMTA, a high-performance and highly flexible sending platform, is available under an Open Source license for high-volume email users looking to replace PowerMTA, Momentum, or traditional Open Source MTAs.

BlackBerry apps for Android can help you improve your productivity. BlackBerry® gives your phone a productivity boost. BlackBerry® makes it easy to use your Android™, whether you need to integrate all your social notifications into one place, or create a smart Calendar. BlackBerry® Hub+ Inbox helps you stay organized. Inbox consolidates all of your email, calendar events, and social notifications from apps such as Facebook, WeChat and LinkedIn into one unified app. To receive notifications and respond from your watch, you can sync your BlackBerry Hub+ Inbox to Wear OS by Google devices. BlackBerry® Hub+ Calendar makes it easy to create and schedule appointments. You can quickly view your events in the Agenda, Day or Week view. You can also respond to invitations from the BlackBerry Hub+ Inbox. With just one tap, you can also call into meetings from your event reminder.

Email, meet AI. Canary can send your emails, prioritize what is important, silence spam, and much more. Say hello to your Inbox Copilot!

All your tasks, notes, calendar, and calendar are linked in one place. Markdown's flexibility allows you to quickly create tasks. You can add options to repeat to-dos, move tasks into the future, and include tags and mentions. Natural language input and automatic completion of tags, mentions and links will speed up your workflow. NotePlan can store all your notes, including meeting minutes and reference material. You can organize your notes however you like. You can organize your notes in simple folders, a bullet journal or a fully linked Zettelkasten. All data is stored locally and accessible on every device. You can keep track of your day by creating a note for each day. You can outline your tasks, create and link notes, or even block time in your calendar. You can see exactly what's on your calendar. Plan ahead or look back. NotePlan stores everything you have written in plaintext Markdown files that can be opened in any text editor. This means that you are always in control of your files and are not locked in.

Your mailbox should be under your complete control. Developermail allows you to configure mailboxes as if they were hosted on your own server. You can include things like catchalls, forwards, catchalls, and sieve filters. Start optimizing your mailbox now and forget about the time-consuming server administration. Each mailbox has reminders, an address book, and calendars. Developermail seamlessly integrates into your daily life as a developer. All configuration is done using YAML files that are stored in your personal git repository on our servers. To update configuration settings, simply use "git clone” and "git push". We are as concerned about privacy and security as you are. Developermail uses proven encryption technology to protect your data. We will not sell your personal data or share it with third parties for marketing purposes.

Skiff is an end-to-end private encrypted workspace that integrates with Mail, Calendar and Pages products to provide a completely secure environment for communication and collaboration. Skiff products have been designed with privacy and security in mind. All apps are built using end-to-end (E2EE) encryption, so you will never have to share sensitive data or private keys. Only you have access to the content of emails at all times. Free tiers are available in abundance Enjoy 10 GB free storage for all your emails, documents, attachments and notes. Create up to four free email aliases in order to protect your identity. Open-source and audited Skiff Mail is an open-source product that uses open-source cryptography and undergoes regular external security audits. You can find our whitepaper and source code at skiff.com. No trackers or Ads Upgrades can be made using crypto payments in a variety of currencies. - Your information is never sold, shared, or collected.

You can't get more time. Your old calendar won't help. It's too easy to lose, misspend, or steal time. Mayday is an AI-powered calendar that helps you manage, organize, and protect your schedule. This allows you to spend more time on meaningful activities. Mayday gets smarter the more you use it. Mayday analyzes your preferences and patterns for scheduling to determine the Ideal Times. Forget about managing time zones, competing priorities, and undocumented schedules. Mayday takes care of the scheduling complexity for you. Mayday's AI algorithms will automatically suggest the best time to schedule meetings, based on your team members' True Availability. As more team members start using Mayday, scheduling becomes more intelligent and helpful, taking everyone's preferences and schedules into account.

Your customers can enjoy secure, business-level email hosting and other value-added services. This is a great solution for SPs and can be used by thousands to millions of users. You can acquire new customers by offering a premium mail server solution that allows you to automate your existing infrastructure. A secure and powerful mail server allows you to manage your email, share and organize your calendars, and sync your mobile devices. This is the perfect solution for businesses of any size. Axigen is very knowledgeable. Take a look inside to see which hats it has on. You can manage your email and make it easy to get things done with tasks, calendars, and notes. Desktop usability is possible in your browser using keyboard navigation and shortcuts. Drag-and-drop, live email list view, frequent folders. Email filters. Out-of-office messages. Individual blacklist /whitelist.

There is no office. That is the only rule. TeamChat for project teamwork, business email, TeamChat to collaborate on office documents, and online meetings. All this and more in our secure cloud at half the cost. Chat in groups organized around projects, upload files and mention coworkers. Comment on emails posted by others. Pin important posts. Integration with email allows you to share received messages directly into TeamChat room to catch the attention of colleagues. Desktop Client and Desktop Office documents for Windows and Linux will help you increase your office productivity. You can choose to purchase the entire Suite or just the apps you need.

Smart AI scheduling for busy team. Reclaim is a scheduling app powered by AI that finds the optimal time for your meetings and tasks. It also helps you to schedule breaks, habits, and habits. Integrate your project manager app or to-do lists to automatically find the most efficient time to complete your tasks. Create your own task list using Reclaim! Schedule your habit routines to coincide with your other calendar events. Want to schedule lunch every day, plan your weekly events on Friday afternoons or code 3x per week? Find the best time to meet with your one-on-1 every week. Reclaim will analyze the calendars of both parties to find free time and automatically reschedule Smart 1:1s in case of conflict. With "high-priority", "flexible duration", and "high-priority" Scheduling links, you can book more meetings (and better meetings) faster.

Dayshape is an AI-powered scheduling and planning platform that was built for professional service firms. Dayshape was created to help you maintain a high-performing workforce, to support your mission, profitability, growth, exceptional client service, and rewarding careers for your employees. Integrate seamlessly with your existing tech stack and eliminate duplicate work. You can also rely on reliable reports. You can create workflows to allow for multi-stage approvals or simplify them and create new jobs quickly. You can choose which resources to assign based upon how closely they match the job. This can be done using criteria such as availability, skill level, location, and grade. Automate the heavy lifting. Simply accept, reject or adjust the proposed workforce plan. When assigning resources, ensure that you have identified and deployed the best people for your job.

Clockwise helps you escape the chaos of work. Clockwise is a smart assistant for your calendar that helps you focus on the important things. Clockwise optimizes your schedule to free up time blocks. Clockwise makes it easy to find the time you need for the things that matter, whether it's a research project or a strategic plan or your next big idea. Remote teams can collaborate easily with the time management toolkit. Clockwise provides uninterrupted blocks of time that allow you to get things done and focus on the most important projects. Clockwise can handle all the busywork for you, such as meeting conflicts resolution, managing different time zones and saving time for lunch. Do you prefer to meet in the morning or leave early to pick up your children? Clockwise is able to understand your needs and help you make time for the things that matter most to you.

You can easily schedule events and jump into meetings without having to switch tabs. Magical uses GPT-4 from openAI and Whisper to create meeting notes, recommend actions, and act as a meeting assistant. Automatically sync your meeting notes to Notion and share them.

It's packed with advanced features that will keep you in control of the details of your calendar. It will be loved by them for its personalized scheduling experience. Your schedulers will appreciate a calendar and not a list with time slots. To make it easy for recipients to view your calendar, overlay theirs on top of yours. All you need to do is click a button to schedule team meetings. Automate round-robin routing, create collective scheduling, and add colleagues on the fly. Connect all your calendars. Check for conflicts between work, personal, and side projects. Then, choose which calendar to store each meeting. You have the power to control your schedule. To encourage recipients to choose the best time, present ranked availability windows. You can avoid meeting overload. Limit the number of meetings that can be booked per week, month, or day so you have time to do deep work. You can create naming conventions to determine scheduling availability based upon the calendar events you create.

View all your files, photos, notes, and other information across all your devices. They are safe, up-to-date, and accessible wherever you may be. You can use Find My iPhone on iCloud.com for locating your device, turning on Lost Mode, and remotely erasing it. You can securely store your files in iCloud Drive and share them with colleagues and friends. You can edit and add photos and videos to one device, but they will appear on all of your devices.

Cal.com is the event-juggling planner for everyone. Focus on meetings, not on making meetings. Individuals can use it for free. Cal will read your availability from your existing calendars, ensuring that you are never double booked. Set repeating schedules to the times during the day and week you want people to book you. Share your cal.com link to make it easy for others to book you at a time convenient for both of us. Per-link, you can set availability, location, duration, and more. Send bookings to multiple calendars or create a default. Cal.com will check for conflicts in all your calendars, and only offer times that are available. Never get double booked again. Cal.com allows you to create processes around your events. Notifications, reminders, and follow-ups are handled automatically. Cal.ai is the future of AI scheduling.

Rise helps you plan, optimize and protect the day so you have more time to do what's most important. Rise is a beautiful, intuitive calendar that uses hundreds signals to find the most efficient times to meet and resolve conflicts. It also blocks out time for focus. Rise will take care of the rest. Upgrade your important meetings to flexible ones and Rise will do the rest. Automatically block your dentist appointment on your private calendar without revealing personal information. Accept suggestions from Rise that are beneficial to everyone. Pin your favorite teammates to quickly schedule and instantly see what they're doing.

Lemcal allows you to schedule your meetings automatically. It eliminates back-and-forth communication and helps you schedule more meetings. By linking your Microsoft or Google accounts, users can book slots directly on your calendar. Lemcal allows you to import your Calendly schedules within seconds. It also creates a fully customized booking page to help attract leads, reduce no shows, and build your brand. Lemcal tracks your meetings automatically and syncs them with the tools that you use, saving time when scheduling meetings. Lemcal syncs with lemlist (a calendar app), Google Calendar, Microsoft Teams and Zoom (coming soon). Your lemcal link opens your fully customized booking page where people can easily schedule meetings with you. Sign up today to reserve your unique URL.

Calendar Contacts makes it easy to manage and track connections, send invites, introduce associates, and schedule time with friends. Calendar Contacts can be used to create events, whether it's a lunch meeting with a colleague or a catch-up with a friend over coffee. Your contacts are already integrated with your calendar so inviting guests takes only seconds. As your needs change and your behaviors change, your calendar will evolve to offer a variety of tools. It becomes more difficult to manage your processes as your organization grows. We'd bet that your scheduling system hasn't been updated for years. Calendar intelligently categorizes your project meetings to determine the relationships between your plans, and the people in your meetings.

Breeze is a simple scheduling app that helps you find common time for meetings via email or text. It can connect to your Google Calendar and allow you to schedule appointments for your guests from a web page. You can have as many Breeze Pages as you like. Each type of event can be assigned a Breeze page. Each page has a unique URL that you can share with guests. You can create event pages for your business or personal activities. It's easy and flexible. Quickly set up your preferences and share your Breeze pages to your guests. Breeze will automatically add the time to your calendar and create a Google Meet or Zoom link for you once the guest has booked their time. Breeze is great for teams and entrepreneurs across the globe, and in multiple time zones. It has automated detection and settings.

Pepito makes it easy to manage vacation and working hours, and creates duty rosters in a simple way. The clever tool anticipates and records overtime and absences. Pepito can take over all the time recording and summarizes all information. Pepito makes sure that the right employees are deployed at a specific time. The core of the tool is the requirement-deployment planning, which forms the basis for securing all shifts. Planners and employees can see the duty times and absences clearly. Actual and target working hours are automatically compared. All information about each employee, regardless of industry, is clearly stored in a digital personnel file. These information can be accessed by decision-makers at all times. These documents include certificates, documents from applicants, holiday agreements, time limits, holiday arrangements, notes from employee appraisals, master data, and many other items.

Philippe Gilbert's vision led to Alinto being born in 2000. His risk paid off! He brought together a team that included passionate developers and experts in cloud messaging to innovate the sector. He launched the first messaging platform in Europe with a Cloud-based email solution and the first mobile-friendly web-based email. We became a major player within the European digital market. Our R&D, Marketing, and Support teams, as software mail server providers, are committed to a focus on availability and proximity. This is more than just an electronic communication system. Our personalized care and solutions are tailored to your needs and requirements. Our experts are available to assist you at all times. We are available to help you, whether you are a telecom operator, internet service provider, or IT specialist.

Secure, enterprise-style email and collaboration without the high price. Kerio Connect offers all the functionality and features for collaboration and messaging without the complexity or high price tag of other systems. Email integration includes shared calendars, scheduling, contacts management and tasks. It also integrates with instant messaging and shared folders. Microsoft ActiveSync allows you to sync messages directly to your mobile device. Instant Messaging can be used from any 3rd party chat/IM application on mobile and desktop. Kerio Connect can be installed in just 10 minutes. Users can also be up and running in as little as 10 minutes. Kerio Connect is available on-premises and in partner-hosted cloud environments. You can deploy for Mac, Windows, and Linux users. Full support for Outlook (Windows, Mac), and many other IMAP and POP compliant email client.

The next-generation collaboration suite. All your chats and meetings, docs, emails, and calendars in one place. Lark has been chosen by these organisations as their all-in-one collaboration tool. You can meet up to 300 people. You can share files to your heart's delight. Keep your organisational knowledge. Support for more than 100 languages Your work is shaped by what tools you use, according to Lark. Lark integrates messaging and video conferencing with schedule management, collaboration documents, cloud storage, email, workflow applications, and document management to create a seamless collaboration experience across all devices. Lark Messenger is the hub of your team's communication. It has multiple features to reduce distractions, and focuses on providing full context to team members. Lark's cloud management and creation capabilities allow you to centralize your ideas and productivity. To bring your ideas to life, you can collaborate seamlessly with any member of your organization. Everything is automatically saved to the cloud.

MailToDoList, a Chrome extension with a keyboard interface, lets you manage your Gmail Inbox like a to-do-list. You can move individual emails up or down. You can group and hide related email. You can also add tasks and notes directly to your emails. MailToDoList allows you to sort your emails in the order you want them to be handled, not the order they arrive. It's stressful to have to remember your priorities when you can't control your email order. MailToDoList allows you to keep your most important emails at the top of your email, where they belong. With MailToDoList, you can work smarter and less stressed.

Your calendar makes it easier to schedule appointments. Auto-fill meeting invites to include your conference details such as meeting location and conference bridge dialing instructions. Clipboard is an easy and quick Outlook add-on. Clipboard is easy to use and requires little or no training. With just one click, you can send pre-written emails and formatted emails. Clipboard is a great tool for managing canned responses of your call center team. Clipboard is an Outlook plug in, so you can use your existing email capabilities and all the time-saving features that Clipboard offers. Start right away with our free newsletter templates. Sample Outlook email templates are available for customer service, customer care, employee recruitment, newsletters, service status notifications and thank-you letters. Save time answering repetitive questions. You can reply to emails with canned answers. You can create, edit, organize, and find all your email messages, responses, attachments, and meeting information in one place.

Reduce email volume by up 95% and have one source of truth for all communications, data, and documentation via shared team inboxes. SEDNA provides team members with full transparency of all correspondence, attachments and actions within a project or message thread. It also allows for quick composition and sharing, which makes communication easier and facilitates collaboration. Each email in a team's inbox has an activity panel that allows for internal conversations, contextual data, time-stamped activity, and other information. This allows team members to work with one message instead of multiple messages that bloat their inboxes. The Activity Panel allows you to see information about the message, including job references, category tags and people involved. It also shows who viewed the message and who responded. Collaboration is easy thanks to the ability of tagging others and adding comments for real-time discussions.

OpenSMTPD implements the server-side SMTP standard as defined in RFC 5321 with some additional extensions. It allows machines to send and receive emails from other systems that use the SMTP protocol. OpenSMTPD was born out of dissatisfaction over other SMTP implementations. It is a complete SMTP implementation. OpenSMTPD was developed primarily by Gilles Chehade, Eric Faurot and other OpenBSD hackers.

Document, contract, and email management. Access all your documents, emails, and digital files using one interface on Mac or Windows. Browser-based document management has been the solution for the past 25 years. It was criticized back then as clunky and awkward and it still is today. DocMoto is a true app-based interface for Mac and Windows.

In a few minutes you can install a fully-functional mail server, while scripts do the rest of the work. The package is designed to be easy to use, with defaults that are reasonable. This allows you to get up and running quickly without having to learn the internals or make decisions that may break your email system. Binaries and user data are strictly separated. The user database is stored as a SQLite database in a file. Poste.io is therefore fully compatible with external storage. Migration, backups or upgrades are therefore very simple and mainly consist of file manipulation. Poste.io was built with security at the forefront. Internet history is full of painful security incidents. We traded in old email client compatibility for features that are more secure and meet modern security requirements.

Open source softwares are the best way to build a mail server. Works on CentOS Stream (Rocket, Alma), Debian, Ubuntu and FreeBSD. You can deploy a FREE, OPEN SOURCE, FULLY FURNISHED, FULL-FEATURED email server in a few minutes. We did all the heavy lifting by combining open source components and applying best practices. Our product takes care of all the major tasks. We also offer professional support in case of any problems. You can control email security and view the transaction log. No one else can read the content of your messages. All components in iRedMail come from open source softwares. You get bug fixes and updates directly from the Linux/BSD vendors you trust. iRedMail allows you to build a mail server using open source softwares.

MailSite Fusion is a Windows email, calendar, and contact server that can push to all types smartphones. It also has full native Outlook sync and a sophisticated AJAX client. It can also share calendars and contacts with other clients. Readers of Windows IT Pro Magazine have voted MailSite as one of the top three mail server products for three consecutive years. Your organization's email services are vital. You need to ensure that you choose a high-quality product from a company that has a track record in communication software. Why this mail server? Rockliffe is sensitive to your concerns and has been developing and refining email security software and email servers for businesses and service providers since 1995. MailSite Fusion was built from the ground up to meet your most important requirements.

Mailcow: Dockerized is a free and open source groupware/email system based on Docker. Mailcow is based on a number of well-known and long-used components that, when combined, result in a carefree email server. Each container represents an application connected by a bridged network.

hMailServer for Microsoft Windows is a free and open-source e-mail client. It is used by Internet service provider, companies, government, schools, and enthusiasts around the world. It can be easily integrated with most existing webmail systems. It offers flexible spam protection based on scores and can be attached to your virus scanner for scanning all incoming and departed email.

An operating system and applications are included with your phone, tablet, or computer. Why not put them on your server as well? ClearOS is being redefined by HPE with the introduction of HPE ProLiant servers. ClearOS is an open-source, affordable operating system that is simple and easy to use. It features a graphical web-based user interface, an application marketplace, and over 100 apps. There are more being added daily. Open source software allows you to choose the applications you want and only pay for what you use. ClearCenter and HPE make it possible for small, home-based, remote, or branch offices to have a server available immediately, without additional cost. ClearOS and HPE ProLiant combine to offer a simple, secure, and affordable experience. It's never been easier to create the IT solution that's right for you.

Cyrus IMAP serves as an email, calendar and contacts server. Cyrus is open source and free. Features: Speed up Security Efficiency Search Engine CardDAV and CalDAV Support Data storage that is robust Replication Scalable for large installations Sieve provides flexible filtering support Supports anti-spam and antivirus toolkits Handles deliverability: SPF, DKIM, DMARC Cyrus SASL offers a wide range of authentication options JMAP Support List of standards supported

Email, collaboration, groupware and content management can be set up in minutes on your own hardware or in the cloud. Citadel's exclusive room-based architectural design makes it easy, versatile and powerful. No other platform combines so many features with such ease using this familiar and consistent analogy. Citadel is open source software that uses the GNU General Public License. It's not some crippled version of an expensive "enterprise edition". All the software available here is free and of the highest quality.

SOGo is a trusted and fully supported groupware server that focuses on scalability, open standards and trust. SOGo is available under the GNU GPL/LGPL version 2 and higher. SOGo is a rich AJAX-based Web application that supports multiple native clients by using standard protocols like CalDAV (CarDAV), CardDAV (GroupDAV) and Microsoft ActiveSync. SOGo is the missing piece of your infrastructure. It sits in the middle your servers to provide a consistent and complete interface for your users to access their information. It has been used in production environments with thousands of users.