Wow, got an email from a customer who's no longer getting password recovery emails from a #libre web app I run for them. Turns out Microsoft has randomly turned off the (non-auth) SMTP service they were using to send the emails (rather than an authenticating account, as that incurs a license fee). Part of an unannounced 'security initiative', apparently.
I feel pity for people who, though no fault of their own, have Microsoft corporation software & policies foisted upon them. Poor sods.
Ugh. I would often have deliverability problems with hosted Microsoft Outlook / Hotmail where email would go into the bin.
Was SPF wrong? No. Was DKIM missing? No. Is the chicken liver spotty? No, and it shouldn’t matter, but this is one of the biggest MX providers on the internet.
It’s a full time job dealing with that. It’s costs being pushed onto me because spammers have made these sorts of filters a requirement and then they’re poorly tuned.
@futuresprog Microsoft is entirely unworthy of its dominant position. It's certainly entirely rubbish at anything tech-related.
The consolidation and the mistrust of other SMTP operators has hurt us all.
@futuresprog it sure has. Microsoft and Google are assholic on many levels.