clusteredMail asks: "I work for a small ISP that up until now has survived with single servers for most critical roles, including the mail server. We are planning to introduce multiple mail servers (primarily for email collection via POP3 and IMAP) and want to put in place the most scalable, resistant to failure system that we can manage. Everything is currently running on one or another flavour of Linux. In my mind, the ultimate scenario would be to have some sort of distributed/clustered file system between the multiple machines, so that any user could log onto any server, and the loss of a single server would not cause downtime for any group of users. Has anyone in the Slashdot community had to put together a system like this using Linux and Open Source Software? If so, how did you fare and what were the major stumbling blocks?""So far, the plan is to split up the mail accounts between multiple servers and use some sort of connection proxy to sort out which account logs into which server but this seems like a rough approach. The disadvantage to this setup: if one server fails all the users who have accounts on that machine will be in the dark, email-wise."
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