Mail forwarding does not work in Plesk for Linux: 550-Verification failed for SRS0

Symptoms

Mail forwarding fails, error in
/var/log/maillog 

plesk postfix/smtp[8055]: AABBCCDD11: to=<[email protected]>, relay=<relay_host_hostname>[203.0.113.2]:587, delay=0.16, delays=0.02/0.02/0.08/0.03, dsn=5.0.0, status=bounced (host <relay_host_hostname>[203.0.113.2] said: 550-Verification failed for <SRS0[email protected]> 550-Previous (cached) callout verification failure 550 Invalid sender <[email protected]> (in reply to MAIL FROM command)

Cause

Sender Rewriting Scheme (SRS) support is enabled and it is not supported on relay host.

Resolution

Enable acceptance of SRS emails from Plesk on the relay host.

OR:

Disable SRS support using the following steps:

1. Connect to Plesk server using SSH.
2. Open the
/etc/postfix/master.cf
file and find the following line:

   plesk_virtual unix - n n - - pipe flags=DORhu user=popuser:popuser argv=/usr/lib64/plesk-9.0/postfix-local -f ${sender} -d ${recipient} -p /var/qmail/mailnames

3. Add
-s
to the end of the line:

   plesk_virtual unix - n n - - pipe flags=DORhu user=popuser:popuser argv=/usr/lib64/plesk-9.0/postfix-local -f ${sender} -d ${recipient} -p /var/qmail/mailnames -s

4. Restart the
postfix
service:

   # service postfix restart