2 login attemps:
May 23 07:32:05 auth: Debug: auth client connected (pid=30473)
May 23 07:32:05 auth: Debug: client in: AUTH 1 PLAIN service=imap secured session=/l1ByoAzHwB/AAAB lip=127.0.0.1 rip=127.0.0.1 lport=143 rport=59935 resp=ADMwMHNsQGxlay5uZXQAdzhiZ2U= (previous base64 data may contain sensitive data)
May 23 07:32:05 auth-worker(30309): Debug: sql(bob@bigmail.com,127.0.0.1): query: SELECT password, allow_nets FROM mailbox WHERE username='bob@bigmail.com' AND enableimapsecured=1 AND active=1
May 23 07:32:05 auth: Debug: client passdb out: OK 1 user=bob@bigmail.com
May 23 07:32:05 auth: Debug: master in: REQUEST 1435107329 30473 1 659782a38e911e2572fbf428067ceaea session_pid=30474request_auth_token
May 23 07:32:05 auth-worker(30309): Debug: sql(bob@bigmail.com,127.0.0.1): SELECT 'bob@bigmail.com' AS master_user, CONCAT(mailbox.storagebasedirectory, '/', mailbox.storagenode, '/', mailbox.maildir) AS home, CONCAT('*:bytes=', mailbox.quota*1048576) AS quota_rule FROM mailbox,domain WHERE mailbox.username='bob@bigmail.com' AND mailbox.domain='bigmail.com' AND mailbox.`enableimapsecured`=1 AND mailbox.domain=domain.domain AND domain.backupmx=0 AND domain.active=1 AND mailbox.active=1
May 23 07:32:05 auth-worker(30309): Info: sql(bob@bigmail.com,127.0.0.1): unknown user
May 23 07:32:05 auth: Error: userdb(bob@bigmail.com,127.0.0.1,</l1ByoAzHwB/AAAB>): user not found from userdb sql
May 23 07:32:05 auth: Debug: master userdb out: NOTFOUND 1435107329
May 23 07:32:05 imap: Error: Authenticated user not found from userdb, auth lookup id=1435107329 (client-pid=30473 client-id=1)
May 23 07:32:05 imap-login: Info: Internal login failure (pid=30473 id=1) (internal failure, 1 successful auths): user=<bob@bigmail.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=30474, secured, session=</l1ByoAzHwB/AAAB>
May 23 07:45:11 auth: Debug: auth client connected (pid=30832)
May 23 07:45:11 auth: Debug: client in: AUTH 1 PLAIN service=imap secured session=9u8Q+YAz4gB/AAAB lip=127.0.0.1 rip=127.0.0.1 lport=143 rport=60130 resp=ADMwMHNsQGxlay5uZXQAdzhiZ2U= (previous base64 data may contain sensitive data)
May 23 07:45:11 auth-worker(30309): Debug: sql(bob@bigmail.com,127.0.0.1): query: SELECT password, allow_nets FROM mailbox WHERE username='bob@bigmail.com' AND enableimapsecured=1 AND active=1
May 23 07:45:11 auth: Debug: client passdb out: OK 1 user=bob@bigmail.com
May 23 07:45:11 auth: Debug: master in: REQUEST 2158231553 30832 1 c492d9e1eb835c2fbb6482ef7dedfadf session_pid=30833 request_auth_token
May 23 07:45:11 auth-worker(30309): Debug: sql(bob@bigmail.com,127.0.0.1): SELECT 'bob@bigmail.com' AS master_user, CONCAT(mailbox.storagebasedirectory, '/', mailbox.storagenode, '/', mailbox.maildir) AS home, CONCAT('*:bytes=', mailbox.quota*1048576) AS quota_rule FROM mailbox,domain WHERE mailbox.username='bob@bigmail.com' AND mailbox.domain='bigmail.com' AND mailbox.`enableimapsecured`=1 AND mailbox.domain=domain.domain AND domain.backupmx=0 AND domain.active=1 AND mailbox.active=1
May 23 07:45:11 auth-worker(30309): Info: sql(bob@bigmail.com,127.0.0.1): unknown user
May 23 07:45:11 auth: Error: userdb(bob@bigmail.com,127.0.0.1,<9u8Q+YAz4gB/AAAB>): user not found from userdb sql
May 23 07:45:11 auth: Debug: master userdb out: NOTFOUND 2158231553
May 23 07:45:11 imap: Error: Authenticated user not found from userdb, auth lookup id=2158231553 (client-pid=30832 client-id=1)
May 23 07:45:11 imap-login: Info: Internal login failure (pid=30832 id=1) (internal failure, 1 successful auths): user=<bob@bigmail.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=30833, secured, session=<9u8Q+YAz4gB/AAAB>