Can't get any incoming e-mails.
I moved e-mails from an old server to this one copying the /var/vmail directory.
Set the directory permissions:
sudo chown -R vmail:vmail /var/vmail
However, I am not getting any new e-mails. I created all the e-mail accounts by hand on the new server.
I keep getting this error:
postfix/pipe: CCEB72248B: to=, relay=maildrop, delay=0.16, delays=0.06/0.01/0/0.09, dsn=4.3.0, status=deferred (temporary failure. Command output: ERR: authdaemon: s_connect() failed: Permission denied /usr/bin/maildrop: Invalid permissions on the filter file - world-writable. )