vishesh kumar: > fatal: btree:/var/lib/postfix/postscreen_cache: unable to get exclusive > lock: Resource temporarily unavailable
You can't share one /var/lib/postfix/postscreen_cache.db
file with more than one postscreen process.
How many main.cf/master.cf files are there on your system?
Instead of /var/lib/postfix, use $data_directory to avoid
file sharing conflicts.
Wietse
