Thanks for your reply. But how will I know what domains I must put into /etc/postfix/transport ?
It is good solution if I already know what domains don't grok VERP-style sender. But I don't... >Use a transport map for sites that don't grok VERP-style sender >addresses, and use smtp_generic_maps to strip off the VERP portion. >UNTESTED example: >/etc/postfix/master.cf: > # NO WHITESPACE in name=value > smtp-no-verp unix - - n - - smtp > -o smtp_generic_maps=pcre:/etc/postfix/no-verp.pcre >/etc/postfix/main.cf: > transport_maps = hash:/etc/postfix/transport >/etc/postfix/transport: > example.com smtp-no-verp: