- Plesk for Linux
The header of a mail contains a message like the following:
# cat /var/qmail/queue/mess/0/11142649
Received: (qmail 50867 invoked by uid 10489);
What does 'invoked by uid 10489' part in mail headers mean?
This message informs that the mail was invoked by a user with uid 10489.
To find the user log in to the server using SSH and execute:
# grep 10489 /etc/passwd