The verbose_proctitle parameter in the Dovecot configuration file controls whether Dovecot adds extra information to its process titles. When this parameter is set to yes, Dovecot will show the username, IP address of the peer, and the connection status for each process. This can help to associate the processes with users and peers, and to monitor the activity of the mail server. For example, the process titles may look like this:
dovecot/imap-login user@domain.com [192.168.0.1] dovecot/imap user@domain.com [192.168.0.1] IDLE
The verbose_proctitle parameter can be set in the /etc/dovecot/dovecot.conf file or in the /etc/dovecot/conf.d/10-master.conf file. The default value is no, which means that Dovecot will only show the process name and the command state. For example:
dovecot/imap-login dovecot/imap [idling]
The other options are not related to the process titles. The --with-linux-extprocnames option for ./configure when building Dovecot is not a valid option. The sys.ps.allow_descriptions and proc.all.show_status parameters in sysctl.conf or /proc are not valid parameters. The process_format parameter in the Dovecot configuration is used to specify the format of the process name, not the process title.
References:
LPIC-2 Exam 202 Objectives, Objective 205.4: Managing a dovecot server
Process Titles — Dovecot documentation, Dovecot Documentation
Dovecot Configuration Parameters: verbose_proctitle, Dovecot Documentation
Dovecot Configuration Parameters: process_name, Dovecot Documentation
How to monitor dovecot processes? - Server Fault, Forum
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