On 2013-06-09 10:34 AM, Zhang Huangbin <zhbmaillisto...@gmail.com> wrote:
On Sunday, June 9, 2013 at 10:09 PM, Charles Marcus wrote:
Dovecot uses login_log_format_elements to determine what it logs for
login attempts... you'll find the variables it supports here:

http://wiki2.dovecot.org/Variables?highlight=%28login_log_format_elements%29

Mine (which logs the username) looks like:

login_log_format_elements = user=<%u> method=%m rip=%r lport=%{lport}
mpid=%e %c session=<%{session}>

This works for IMAP/POP3/Managesieve services provided by Dovecot, and
logged in Dovecot log file, but it won't appear in Postfix/Dovecot log files for
SMTP service.

Hmmm... well, I definitely see the usernames on my system (postfix+dovecot) for 
both successful and unsuccessful logins...

successful login:

2013-06-09T10:50:38-04:00 myhost postfix-587/smtpd[5807]: E9482B73AF4: 
client=client.example.com[192.168.1.110], sasl_method=PLAIN, 
sasl_username=myu...@example.com

bad password:

2013-06-09T11:02:38-04:00 myhost postfix-587/smtpd[5903]: connect from 
myclient.example.com[###.###.###.###]
2013-06-09T11:02:38-04:00 myhost dovecot: auth-worker(5904): 
sql(validu...@example.com,###.###.###.###): Password mismatch

invalid username:

2013-06-09T11:01:45-04:00 myhost postfix-587/smtpd[5903]: connect from 
myclient.example.com[###.###.###.###]
2013-06-09T11:01:50-04:00 myhost dovecot: auth-worker(5904): 
sql(invalidu...@example.com,###.###.###.###): unknown user

So, it is possible...


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