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Nik
Asked: 2010-05-30 16:02:45 +0800 CST

SquirrelMail (Courier) IMAP Issue

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Alright, so I'm having this issue with SquirrelMail and Courier IMAP. When I try to login to SM, it throws this error at me:

ERROR: Connection dropped by IMAP server.

The IMAP server is running on 993 without SSL (which might be the problem). How do I fix this, and I've already taken a look at the official documentation in relation to this error with no fix.

imap squirrelmail

2 Answers

  1. Best Answer

    As Bill said, 993 is usually IMAPS. Are you sure it's running without SSL? What happens when you do:

    telnet serverip 993

    Do you get a greeting? If not, what about:

    openssl s_client -connect serverip:993

    If you get a response in either, just type:

    A01 LOGOUT

    It'll disconnect.

    If you get a response from the first, what does it say? If you get a response on the second, it means you are running IMAPS, which means you need to change your config/config.php settings for your imap connection (see $use_imap_tls).

    As a side, Courier defaults to limiting connections from a single IP to 4 connections. If multiple people will be using this SquirrelMail install, you'll want to increase that limit, see the MAXPERIP setting in the imapd config file.

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  2. Port 993 is IMAPS (with SSL) dovecot may be automatically trying SSL as per standards. Check that the use_imap_tls option is set to false. If at all possible enable SSL on port 993 or use port 143 IMAP.

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