On Tue, 9 Jul 2024 at 15:39, Viktor Dukhovni via Postfix-users < postfix-users@postfix.org> wrote:
> On Tue, Jul 09, 2024 at 12:54:38PM +0100, Gilgongo via Postfix-users wrote: > > Just configure content inspection on all the submission pathways. > > > My first thought was to start by firewalling off mail ports on the local > > machine to only allow processes owned by root or postfix. > > Why? Just inspect the messages they submit, SASL is not required. > Apologies - perhaps I've misunderstood, but if I use (for example) mail.mailutils to send to u...@yahoo.com from m...@mydomain.com then I see the client communicate directly with the MX of yahoo.com over port 25. I'd like it to communicate with my mail server instead. Jonathan
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