authentication problems? But maybe not?

[Andrew Heath]

This is my syslog which contains auth errors. The oddity of this is that IMP
works fine. I know, why complain, well this is loading my logs with false
data. The log below is a simple session of logging into an account, briefly
looking at the inbox, and then pressing logout. Can anyone explain why this
happens this way? Thanks.

Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
Jul  2 13:13:56 firewall IMP[3744]: Login 209.315.192.253 to localhost:143
as andrew
Jul  2 13:14:15 firewall imap(pam_unix)[14292]: authentication failure;
logname= uid=0 euid=0 tty= ruser= rhost=  user=andrew
Jul  2 13:14:17 firewall imapd[14292]: Login failure user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:20 firewall imapd[14292]: AUTHENTICATE LOGIN failure
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:20 firewall imap(pam_unix)[14292]: authentication failure;
logname= uid=0 euid=0 tty= ruser= rhost=  user=andrew
Jul  2 13:14:22 firewall imapd[14292]: Login failure user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:25 firewall imapd[14292]: AUTHENTICATE LOGIN failure
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:25 firewall imap(pam_unix)[14292]: authentication failure;
logname= uid=0 euid=0 tty= ruser= rhost=  user=andrew
Jul  2 13:14:28 firewall imapd[14292]: Login failure user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:31 firewall imapd[14292]: AUTHENTICATE LOGIN failure
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:31 firewall imapd[14292]: Logout user=???
host=localhost.localdomain [127.0.0.1]
Jul  2 13:13:52 firewall xinetd[14281]: USERID: imap OTHER :apache
Jul  2 13:14:05 firewall xinetd[14285]: USERID: imap OTHER :apache
Jul  2 13:14:13 firewall xinetd[14289]: USERID: imap OTHER :apache
Jul  2 13:14:15 firewall xinetd[14292]: USERID: imap OTHER :apache
Jul  2 13:13:54 firewall imapd[14281]: imap service init from 127.0.0.1
Jul  2 13:13:55 firewall imapd[14281]: Authenticated user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:13:59 firewall imapd[14281]: Logout user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:11 firewall imapd[14285]: imap service init from 127.0.0.1
Jul  2 13:14:14 firewall imapd[14285]: Authenticated user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:14 firewall imapd[14289]: imap service init from 127.0.0.1
Jul  2 13:14:14 firewall imapd[14289]: Authenticated user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:15 firewall imapd[14292]: imap service init from 127.0.0.1
Jul  2 13:14:15 firewall imapd[14285]: Logout user=andrew
host=localhost.localdomain [127.0.0.1]
Jul  2 13:14:31 firewall imapd[14289]: Logout user=andrew
host=localhost.localdomain [127.0.0.1]