please, can you explain what you mean when you say "Changing db files to just files resolves the issue"?
Originally Posted by brian
Your /etc/nsswitch.conf contained
This was causing libnss.so to load libnss_db.so which is linked against libdb-4.3.so. This conflicts with the bdb version libdb-4.7.so that postfix is linked against. Postfix output wasn't really indicating that it was segfaulting but if you tried to run /opt/zimbra/postfix/libexec/master by hand it was noticeable.
Changing db files to just files resolves the issue.