If you’re looking to set up secure (SSL-encrypted) access to your Linux mail servers — like I was, tonight — you may find the following three pages of immense use:

• stunnel.org, the home of the fabulous SSL wrapper for nearly any network application. (For IMAP, this page is of particular help.)
• Linux imapd with SSL quick howto, which helps you out a bit with the UW version of the IMAP server.
• stunnel FAQ, which specifically addresses the SMTP issue.

And remember — if you’re setting up your machine to have an SSL pathway to the SMTP server (the mail-sending server), then you’ll want to make sure to set up your access restrictions again, since the sendmail anti-relay stuff doesn’t apply to connections coming in via stunnel on the same machine.

(WOW, that was all geeky of me.)