Le 10 février 2024 15:12:29 GMT+04:00, Hal Murray via mailop <[email protected]> a écrit : > >[email protected] said: >> Bypassing spam checking would make spammers use exactly that way to send >> spam. > >Sorry I wasn't clear enough. > >My "handshke to set things up" was meant to keep out spammers. > >The idea was that the final receiving MTA would know that it was expecting >forwarded mail for user@domain from a set of IP addresses. > >I was picturing something like: > user goes to final MTA and says I want you to accept forwarded mail for me >from example.com > then he goes to example.com and says "please forward my mail to > [email protected]" >example.com would then contact final.com and say "OK if I forward me's mail to >you?" >If yes, then example.com says "Here are the IP addresses I use for >forwarding...."
I had a similar idea but much more simple: we just keep the part where the user says to the final MTA with which they have [email protected] that they are “forwading from [email protected]”. Then, when receiving an email SRS rewritten from forwarder.org to that [email protected], the final MTA could check DKIM against the original domain but SPF and ARC against the forwarder domain since it is expecting mail to be forwarded that way for that user. Kind of a new domain alignment. No need to tell the forwarding IP, they are provided by SPF for the forwarding domain. _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
