Re: [mailop] Yahoo throttling 421 4.7.0 [TSS0...

Hi Alexander, MailChimp had been seeing this issue as well across our IPs. It was happening with all domains that use Yahoo’s mail infrastructure (AOL, Verizon, etc). We reached out to Yahoo and they got it fixed up on their end. Your milage may vary of course, but if what you’re seeing is rela

[mailop] Yahoo throttling 421 4.7.0 [TSS0...

We've seen a big uptick in Yahoo throttling in the past 7-10 days with this typical message: 421 4.7.0 [TSS04] Messages from XX.XX.XX.XX temporarily deferred due to user complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html This seems to be happening fairly indiscriminatel

[mailop] Virgin Media - postmaster contact needed

HI, Does anyone has a contact for Virgin Media postmaster team? We have some Dmarc rejection issues with them and I cannot find a contact , the abuse@ address is not monitored it seems. Thank you Andrei Onofrei Dynamics 365 Email Deliverability Engineer nozhkin.ser...@microsoft.com