On 2024-12-29 at 21:23 -0500, postfix--- wrote: > (B) MORE COMPREHENSIVE SOLUTION: destination-based Postfix relayhost > > The above is currently all or nothing. Eventually, I will want to > improve, set up multiple relays with accounts on the too big to ignore > balkanizing providers and automatically relay based on recipient address > through accounts at each specific provider, while maintaining the > reply-to: address as my original one. I hoped to find time during this > Winter break, but, oh well, priorities, priorities. > > For now, I got more than one account and credentials ready -- the usual > suspects: Google and Microsoft. But I have not had time to actually > connect the plumbing and test (not sure that sending to my own account > qualifies as enough testing). I expect some challenges, see further below.
While there may be some "From: j...@example.com via j...@gmail.com", I think in some cases it is possible to do (they want to embrace you, remember?). As an additional feature, at one point you might want to add a disclaimer at the top like "You need to reply to ...@... not to any other address" when rewriting transports. However, I suspect the more immediate issue will be that these providers are precisely those that will require OAuth dances, which are not so widely implement, since they are not as straightforward. Sometimes you can sidestep them with an App password, but that itself may have its own requisites (such as enabling a phone-based 2FA). Looking forward to see how it goes _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
