Nataraj: > I am extensively familiar with my main.cf file and am aware of exactly > what changes have been made. This mail server has been running stably > for years and I am not yet aware of changes to the mail configuration > files surrounding the time when this problem came up. > > There are quite a number of mailserver packages out their that use > postfix as the MTA. I'm extensively familiar with the architectures of > both the postfix and vpostmaster systems and I assure you that there is > no front end. The port 25 service on my mailserver is the postfix > smtpd. Vpostmaster, is simply a policy and transport agent with spam > management and a web based GUI for management. It's quite nice and I > highly recommend it to people.
If the Postfix SMTP server hangs after 10s and no such smtpd_timeout is in main.cf, then either the smtpd_timeout value is taken from master.cf, or it is taken from a different main.cf file. It is worthwhile at this point to do find / -name main.cf -ls and see what shows up. Wietse