Re: [courier-users] Strange issue with authentication/mail pickup

[Sam Varshavchik]

Gor ony writes:

What I can't piece together is how to debug the break between authlib saying  "Valid user" and "exec(imap/pop3) Failed".

Thanks,

# /sbin/fuser -n tcp 993
993/tcp:               803

So that's PID 803, in my case. Attach strace to that process:

# strace -f -o /tmp/strace.log -s 256 -p 803
Process 803 attached



The log file will be a little bit large, you can grep it for clues:

]# fgrep execve /tmp/strace.log


This is how it would look like for a successful login.

Do you have SELinux turned on? If it's on, try turning it off.

Find the pid of the couriertcpd pid that's listening on the imap port, you seem to be trying imap-ssl, so that will be port 993: The attempt to make a connection. After it fails, you can kill strace with CTRL-C. 336 execve("/usr/lib/courier-imap/bin/couriertls", ["/usr/lib/courier- imap/bin/couriertls", "-server", "-tcpd", "/usr/lib/courier- imap/sbin/imaplogin", "/usr/lib/courier-imap/bin/imapd", "Maildir"], [/* 58 vars */]) = 0 337 execve("/usr/lib/courier-imap/sbin/imaplogin", ["/usr/lib/courier- imap/sbin/imaplogin", "/usr/lib/courier-imap/bin/imapd", "Maildir"], [/* 59 vars */]) = 0 337 execve("/usr/lib/courier-imap/bin/imapd", ["/usr/lib/courier- imap/bin/imapd", "Maildir"], [/* 63 vars */]) = 0 343 execve("/usr/libexec/gam_server", ["/usr/libexec/gam_server"], [/* 66 vars */] <unfinished …>

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