Re: [mailop] outlook.com 421 try again later S77719

Hi List, was about to write the same just when Andreas' mail popped up. Also noticing an increasing amount of mails towards Microsoft getting deferred with 451 4.7.500 Server busy. Please try again later from [x.x.x.x]. (S77719) We see this happening for different from-domains as well for diff

Re: [mailop] dovecot lmtp and smtputf8

+1 Last official statement we saw was, that it's being tracked internally as DOP-1045 https://www.dovecot.org/pipermail/dovecot/2019-March/115286.html However, we'd be interested in the current state regarding this as well.

Re: [mailop] Delivery and DNS issues for Microsoft / m365

Hey Dan, we can confirm both the lookup fails and the ATTR2 errors. Looking back in the logs, we start seeing the lookup fails since about 08:04 UTC. -- Kevin Kelker (Postmaster), Mittwald CM Service GmbH & Co. KG Von: mailop im Auftrag von Dan Malm via mailo

[mailop] Yahoo TSS04 support loop

Hi list, we've encountered blockings from yahoo/aol by their response code TSS04 on two of our outbound servers since several weeks. We've then contacted their postmaster team via the contact form but since then, we are only getting their default response with links to their FBL, best practices