Rawlog
Dovecot supports logging post-login IMAP/POP3 traffic (also TLS/SSL encrypted) using rawlog binary. It works by checking if dovecot.rawlog/ directory exists in the logged in user's home directory, and writing the traffic to yyyymmdd-HHMMSS-pid.in and .out files. Each connection gets their own in/out files.
Home directory
Note that for rawlog to work, your userdb must have returned a home directory for the user. If you can't get rawlog to work, you should verify that the home directory really is where you expected it to be by setting mail_debug=yes and checking the logs. You should see a line such as:
Effective uid=1000, gid=1000, home=/home/user
In above configuration rawlog would expect to find /home/user/dovecot.rawlog/ directory writable by uid 1000.
If you don't have the home directory and you can't or don't want to modify userdb configuration, you can add:
mail_home = /home/%u # or temporarily even e.g. mail_home = /tmp/temp-home
Configuration
To enable rawlog, you must use rawlog as a post-login script:
service imap {
executable = imap postlogin
}
service pop3 {
executable = pop3 postlogin
}
service postlogin {
executable = script-login -d rawlog
unix_listener postlogin {
}
}You can also give parameters to rawlog:
-b: Write IP packet boundaries (or whatever read() sees anyway) to the log files. The packet is written between <<< and >>>.
- -t: Log a microsecond resolution timestamp at the beginning of each line.
- v2.1 and newer:
- -f in: Log only to *.in files
- -f out: Log only to *.out files
- v2.0 and older:
- -i: Log only to *.in files
- -o: Log only to *.out files
