On 2/8/2016 11:31 PM, Stuart Longland wrote: > > Is it possible to nominate both servers as being the destinations for > both domains so that a single email sent to user@domain is sent to both > internal servers?
To deliver multiple messages, you need to have multiple recipients. The easiest way to do this is to add a virtual_alias_maps entry for each user (NOT virtual_alias_domains) to include a mapping to the new server. Here's a bare-bones example: # main.cf virtual_alias_maps = hash:/etc/postfix/virutual_alias # virtual_alias us...@example.com us...@example.com us...@new.example.com us...@example.com us...@example.com us...@new.example.com ... Don't be tempted to use wildcard rewriting here; that will break recipient validation. Use your favorite scripting language to generate the list programmatically. Use a transport_maps entry to route the new domain to the new server # main.cf transport_maps = hash:/etc/postfix/transport # transport new.example.com relay:[IP.of.new.server] And finally, use smtp_generic_maps to rewrite the domain name back to the original during delivery. # main.cf smtp_generic_maps = hash:/etc/postfix/generic # smtp_generic -- wildcards OK here @new.example.com @example.com References: http://www.postfix.org/ADDRESS_REWRITING_README.html http://www.postfix.org/postconf.5.html#transport_maps http://www.postfix.org/postconf.5.html#smtp_generic_maps http://www.postfix.org/postconf.5.html#virtual_alias_maps -- Noel Jones
