On Mon, Dec 30, 2019 at 12:46:50AM -0800, Stats Student wrote: > 1) receive messages for users in a Postgres database and hand those > messages to an external script for processing (no traditional > mailstore). The server handles mail for only one domain. > > 2) for a handful of accounts (postmaster, help, root), the messages > should be forwarded to another address (different domain).
This is easily handled via virtual_alias_maps, rewriting the recipients in question. > Would be great for this forwarding to take place without going through the > processing script in (1). Virtual alias rewriting happens before message delivery. Note that the domain need not be configured as a virtual alias domain, virtual alias rewriting happens for all recipients, regardless of address class. > A very long time ago, I had it working with content_filter (as > described in http://www.postfix.org/FILTER_README.html#advanced_filter) > and virtual_alias_maps. That's unnecessary, a pipe(8) transport is just fine, unless the mail is going back into Postfix after processing by the script. > But for some reason (receive_override_options = no_address_mappings) > causes the server to ignore users in virtual_alias_maps and bounce. Well, that's simply not how Postfix works, when you have a content_filter. The bounce only happens with no_address_mappings in combination with NO content_filter. But, you don't need either a filter or no_address_mappings. > What's the best way to get this configured? Would appreciate specific > setup recommendations (relay vs virtual aliases, content_filter, etc). > Happy to provide additional details. Rewrite the exempt users to a different domain, resolve the original domain to a pipe(8) transport that runs the script. Provided the script does not re-inject modified email back into Postfix with the same recipient domain. -- Viktor.
