Best Mail Servers in Japan

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.

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

KingSMTP (formerly known as Kingmailer, founded in 2017) is a simple and fully featured mail server / SMTP service for use by anyone, not just developers. Start sending, receiving or routing your emails with a few clicks.

SmarterMail is the ideal Microsoft Exchange alternative. First, it's the only business email server on the market that offers native support for the protocols that power Exchange: MAPI, EWS, and EAS. It does this without the need for any additional software or plug-ins for Microsoft Outlook or other clients -- desktop and mobile! Best of all, it offers all of the features of Exchange, but at a FRACTION of the cost. In addition, features like audio and video group chat, and Online Meetings for team meetings and group collaboration are included at no extra charge. It's designed to provide the functionality businesses need, without sacrificing secure, reliable access to business, and personal, communication.

Provide your clients with reliable, enterprise-grade email hosting alongside a range of additional services. This outstanding option caters to service providers and is adaptable for a user base ranging from thousands to millions. Attract more clients by presenting a top-tier email server solution renowned for its flexibility, seamlessly integrating with your current systems. You can oversee your email, coordinate and share calendars, and synchronize your mobile devices, all supported by a robust and secure mail server. This solution is ideal for organizations of any scale. Axigen possesses extensive expertise; explore its diverse functionalities and select the ones that align with your needs. Effortlessly manage your emails while enhancing productivity with tools for calendars, tasks, and notes. Experience user-friendly browser functionality with features like keyboard shortcuts, drag-and-drop capabilities, real-time email viewing, frequently accessed folders, customizable email filters, vacation replies, and personal blacklist/whitelist options, ensuring a comprehensive email management experience. With such a versatile system, businesses can streamline their communication effectively.

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.

Our comprehensive Unified Communications technology is anchored by the CommuniGate Pro platform. This system facilitates extensive Unified Communications through open APIs that allow seamless integration with various business applications. With the ability to scale to hundreds of millions of accounts, CommuniGate Pro is perfectly suited for large-scale alert systems, multimodal communications in web applications, or highly secure network architectures. Importantly, achieving such scale does not compromise efficiency or reliability; the platform is exceptionally agile and capable of supporting resilient applications in military and embedded environments. Furthermore, CommuniGate Pro has received approval for use by governmental agencies in both Europe and the USA. Its reputation for outstanding stability—boasting impressive uptimes akin to VMS—has made it a trusted choice among military, transportation, and research institutions. Additionally, the platform enables banks to efficiently manage email services for millions of clients while ensuring compliance with regulatory standards. The server's signaling capabilities can also be effectively implemented within a hybrid system, enhancing its versatility even further. This makes CommuniGate Pro a top-tier solution for organizations looking to optimize their communications infrastructure.