Apple Mail, Courier IMAP redeemed
About a year ago, I wrote about Apple Mail's infuriating habit of falling "offline" when reading mail over IMAP. I've been running the Courier IMAP mailserver on FreeBSD for years, and there's been quite a bit written about Mail not co-operating too well with it. I suppose I went as far as blaming Mail in my previous post, and others have blamed Courier IMAP. On a whim last night, I did two things: upgraded Courier IMAP to 4.2.1,1 (not the latest version, but the latest FreeBSD Port), and increased the MAXPERIP configuration variable (which controls how many simultaneous connections can be made to the IMAP server from a single host) to 20, from the default of 4. Mail and Courier IMAP now Just Work. (Well, Mail hasn't gone "offline" in about 24 hours.) I can't be sure, but I suspect that increasing MAXPERIP alone would have been sufficient.