mail.log Code: Jul 21 22:02:35 ktownmods dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=xxx.xxx.xxx.xxx, lip=178.254.3.17, mpid=5258, TLS, session=<TE6jWNlUCLdXkews> Jul 21 22:02:35 ktownmods dovecot: imap([email protected]): Connection closed in=27 out=765 Jul 21 22:02:38 ktownmods postfix/smtpd[3462]: connect from localhost[::1] Jul 21 22:02:38 ktownmods postfix/smtpd[3462]: disconnect from localhost[::1] ehlo=1 quit=1 commands=2 Jul 21 22:02:39 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 1 secs): user=<>, rip=::1, lip=::1, TLS, session=<mBvcWNlUSI0AAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:39 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<NObcWNlUONUAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:39 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<ef/cWNlUmKwAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:39 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<VxTdWNlUVpMAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:44 ktownmods postfix/smtpd[3540]: warning: hostname xof.su.example.com does not resolve to address 91.200.12.181 Jul 21 22:02:44 ktownmods postfix/smtpd[3540]: connect from unknown[91.200.12.181] Jul 21 22:02:46 ktownmods postfix/smtpd[3462]: connect from unknown[189.207.186.28] Jul 21 22:02:46 ktownmods postfix/smtpd[3540]: warning: unknown[91.200.12.181]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Jul 21 22:02:46 ktownmods postfix/smtpd[3540]: lost connection after AUTH from unknown[91.200.12.181] Jul 21 22:02:46 ktownmods postfix/smtpd[3540]: disconnect from unknown[91.200.12.181] ehlo=1 auth=0/1 commands=1/2 Jul 21 22:02:49 ktownmods postfix/smtpd[3462]: warning: unknown[189.207.186.28]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Jul 21 22:02:49 ktownmods postfix/smtpd[3540]: connect from localhost[::1] Jul 21 22:02:49 ktownmods postfix/smtpd[3540]: disconnect from localhost[::1] ehlo=1 quit=1 commands=2 Jul 21 22:02:49 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<EPR2WdlUYo0AAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:49 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<ar93WdlUUtUAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:49 ktownmods postfix/smtpd[3462]: disconnect from unknown[189.207.186.28] helo=1 auth=0/1 quit=1 commands=2/3 Jul 21 22:02:49 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<AuZ3WdlUsqwAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:49 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<3fx3WdlUcJMAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:59 ktownmods postfix/smtpd[3540]: connect from localhost[::1] Jul 21 22:02:59 ktownmods postfix/smtpd[3540]: disconnect from localhost[::1] ehlo=1 quit=1 commands=2 Jul 21 22:02:59 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<DuwRWtlUeo0AAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:59 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<macSWtlUatUAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:59 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<xMISWtlUyqwAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:02:59 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<E+ISWtlUiJMAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:03:09 ktownmods postfix/smtpd[3462]: connect from localhost[::1] Jul 21 22:03:09 ktownmods postfix/smtpd[3462]: disconnect from localhost[::1] ehlo=1 quit=1 commands=2 Jul 21 22:03:09 ktownmods dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<IsSsWtlUko0AAAAAAAAAAAAAAAAAAAAB> Jul 21 22:03:09 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, TLS, session=<Q4CtWtlUgtUAAAAAAAAAAAAAAAAAAAAB> Jul 21 22:03:09 ktownmods dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=::1, lip=::1, secured, session=<y5mtWtlU4qwAAAAAAAAAAAAAAAAAAAAB>
If that's the exact time of your test: Jul 21 22:02:46 ktownmods postfix/smtpd[3540]: warning: unknown[91.200.12.181]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Then probably a wrong username or password was used in the email client. The username is the full email address.
Code: Connecting to 178.254.3.17 220 ktownmods.org ESMTP Postfix (Ubuntu) [994 ms] EHLO PWS3.mxtoolbox.com 250-ktownmods.org 250-PIPELINING 250-SIZE 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN [727 ms] MAIL FROM:<[email protected]> 250 2.1.0 Ok [741 ms] RCPT TO:<[email protected]> 454 4.7.1 <[email protected]>: Relay access denied [730 ms] PWS3v2 6470ms