It appears that Sebastian Nielsen via mailop <sebast...@sebbe.eu> said: >Reason to have a hop limit is to prevent infinite loops where 2 email >addresses or servers point on each other. > >So its not good to set a hop limit too high either, without any compensating >controls, like having a high hop limit, but cease delivery if it for example >stumbles upon 2 >received lines that are identical except for date/time, or if more than 1 IP >have duplicates in their received-line.
If you really want to stop mail loops, use a Delivered-To header like qmail, Postfix, and Courier do: https://datatracker.ietf.org/doc/draft-duklev-deliveredto/ Other than that I agree that a fairly high Received limit like 50 hops makes sense. As others have noted, I would be very careful trying to intuit from Received headers that you're in a loop. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
