Yep. Remember this when ISPs yell at ESPs to immediately suppress addresses from all future mailings based on a single user unknown bounce. One truly cannot always trust every single bounce received.
On Tue, Dec 15, 2020 at 5:07 PM Chris Wedgwood via mailop <[email protected]> wrote: > > things break, it happens... > > but why 5xx (vs 4xx) in this case? > > this means means emails are being lost, some of won't/can't be resent > and recovered > > with 4xx most of them would be delivered once things come right > > the confidence in a hard-bounce in this instance seems misplaced > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop -- Al Iverson // Wombatmail // Chicago Song a day! https://www.wombatmail.com Deliverability! https://spamresource.com And DNS Tools too! https://xnnd.com _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
