What's a good mail server for development use? [closed]

Question

I'm doing some development which will involve reacting to emails, and I'd like to use a local IMAP mail server for this.

I currently use Devnull SMTP server for testing of sending emails, but this just logs and discards messages, it doesn't do IMAP for checking incoming emails/mailboxes.

I don't need/want a full-blown server, just something lightweight I can easily start/stop as required.

Multi-platform is preferred, but feel free to provide answer for specific platforms also.

(A POP3-based server would also be acceptable for development use, since I'll be supporting both in my code anyway.)

Answer 1

Take a look at hMailServer.

Answer 2

I consider JAMES the best mail server for development. And its portable too. Fully written in Java.

Answer 3

Mercury Mail Server is a full featured mail server (minus webmail), however it is very light and should meet your need: Mercury Mail Server

Edit: Forgot to mention Windows/Netware only