Grant Taylor via mailop <mailop@mailop.org> (Fr 24 Mär 2023 16:42:07 CET): > On 3/24/23 1:24 AM, Renaud Allard via mailop wrote: > > I would say, that's called greylisting. But with a changing envelope, > > the message has no chances to pass any greylisting process. The > > behaviour from mailgun would make them unable to pass any kind of > > greylisting anywhere. > > That's one of the advantages of NoListing (TCP reset or timeout on high > priority / low numbered MX) in that it would be compatible with this.
Hm. Maybe I'm stupid.
What does this change? From senders PoV it is a temporary error. The
sender will retry.
And on my side I still do not recognise their 2nd attempt, if they use a
variable MAIL-FROM.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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