On 10/22/2013 8:41 AM, btb wrote: > On 2013.10.21 17.54, Noel Jones wrote: >> On 10/21/2013 3:53 PM, btb wrote: >>> i have a scenario in which certain email is sent using envelope >>> senders that contain host names that are known only on the local >>> lan/network, and unknown on the internet. most mail expressing that >>> characteristic stays local, but occasionally, some is legitimately >>> destined for the public internet. to that end, with such mail, i'd >>> like to change the sender domain part to @example.com, but only if >>> the recipient domain part does not end in example.com [both the >>> sender and recipient domain part may be @example.com, >>> @foo.example.com, @bar.foo.example.com, etc]. >>> >>> what is the right method for doing this? given >>> ADDRESS_REWRITING_README, it seem to possibly be a fit for either >>> masquerade_domains or smtp_generic_maps, but i'm not certain, and >>> i'm not sure how to apply selectively. >>> >>> -ben >> >> smtp_generic_maps will do that nicely. Add the rewriting on the >> "smtp" outgoing transport in master.cf to limit rewriting to >> non-local recipient domains only. >> >> #master.cf >> # find the existing "smtp unix ... smtp" transport and add to it: >> -o smtp_generic_maps=regexp:/etc/postfix/generic.regexp >> >> >> # generic.regexp >> /^(.*)@some\.fantasy\.invalid$/ $1...@example.com > > thanks. wrt limit rewriting to non-local recipient domains only, by "stays > local", i meant local in terms of the local network, not in terms of postfix. > postfix is responsible for only systems.example.com: > > virtual_mailbox_domains = ldap:$table_directory/virtual_mailbox_domains.cf > >> postmap -q 'systems.example.com' ldap:./tables/virtual_mailbox_domains.cf > systems.example.com > > while everything else leaves via smtp and is delivered via mx records - some > of which is for other recipients ending in @example.com or .example.com > [delivered to other hosts on the local network], and the rest of course out > onto the internet. how can i apply smtp_generic_maps selectively, for only > certain recipient domains [ones not ending in @example.com or .example.com] > leaving via smtp - the goal being to rewrite the sender to @example.com for > mail destined for the internet? > > -ben >
Postfix doesn't have a specific feature to rewrite the sender based on the recipient. Arrange for internal network traffic to use a specific transport, such as the "relay" transport, and let internet traffic use the default "smtp" transport. # transport .example.com relay: -- Noel Jones
