There was not any auth failure or err messages in secure log related to imaps being logged.
But the dovecot.log does have more detailed info:

"
Jan 14 09:18:42 Info: imap-login: Internal login failure: user=<user1>, method=PLAIN, rip=X.X.X.X, lip=X.X.X.X, TLS
Jan 14 09:19:03 Info: auth(default): client in: AUTH    1       PLAIN   service=IMAP    secured lip=X.X.X.X  rip=X.X.X.X resp=AGJicm9vbQBlZTBuQHJkMA==
Jan 14 09:19:05 Info: auth(default): pam(user1,X.X.X.X): pam_authenticate() failed: Authentication failure
"


Li


On 1/14/06, seth vidal <skvidal@linux.duke.edu> wrote:
On Sat, 2006-01-14 at 10:31 -0500, Li Cai wrote:
> I am trying to migrate from UW imap to dovecot.
>
> OS: RHEL 3  X86
> MTA: Postfix
> Auth: PAM (NIS server)
>
> Most of the users are fine, but I have some users have problems:
>
> "
> Jan 14 09:18:42 Info: imap-login: Internal login failure:
> user=<user1>, method=PLAIN, rip=X.X.X.X, lip=X.X.X.X, TLS
> "

what does the secure.log say when this happens? Is there a pam auth
failure just before this?

-sv