[SOLVED] Error: Connection dropped by IMAP server with dovecot

kaplan71 · 04-19-2011, 10:26 AM

Hi there --

I am running SquirrelMail version 1.4.8-5.el5.centos.10 on a CentOS 5.6 64-bit distribution with MailScanner 4.83.4, Sendmail 8.13.8/8.13.8, and Dovecot 1.0.7 release.

One user is having problems connecting via the SquirrelMail interface to his e-mail. Whenever he tries to connect, he gets the following error message:

Quote:

Error: Connection dropped by IMAP server with dovecot

I have tested another user account, and that user is able to connect without issue. I confirmed the presence of dovecot.index, dovecot.index.cache, and dovecot.index.log files in the user's <HOME DIR>/mail/.imap/INBOX folder.

The /var/log/maillog files do not list any apparent error messages with SquirrelMail. Does anyone have any idea as to what other steps I need to take to correct this issue? Thanks.

kaplan71 · 04-19-2011, 12:55 PM

Hi there --

I did some investigating of the dovecot.conf file, and I came across something in
the dovecot.conf file. The section I am referring to is shown below:

Code:

# Valid UID range for users, defaults to 500 and above. This is mostly
# to make sure that users can't log in as daemons or other system users.
# Note that denying root logins is hardcoded to dovecot binary and can't
# be done even if first_valid_uid is set to 0.
#first_valid_uid = 500
#last_valid_uid = 0

I ran the cat command on the passwd file, and did a grep for the two user accounts.
The account that worked had a userid that was greater than 500, while the one that
did not work had a value below the 500 integer.

I changed the uid of the problem user account to a value greater than 500, and was
subsequently able to log into the server.