We have found we have had to employ rate limiting to Yahoo (and a a few others). They seem sensitive not so much to total volume, but to sending rates from low-volume senders like us.
Hope that helps, Mark _________________________________________________________________ L. Mark Stone, Founder North America's Leading Zimbra VAR/BSP/Training Partner For Companies With Mission-Critical Email Needs Need more email security & compliance? Ask me about Mimecast! From: "mailop" <mailop@mailop.org> To: "Vaibhav" <v.kulawade...@gmail.com>, "mailop" <mailop@mailop.org> Sent: Wednesday, May 12, 2021 8:37:33 PM Subject: Re: [mailop] Reg. delivery issues at Yahoo ISP You might want to look at any other customers from the same or nearby IP ranges that aren’t sending transactional email? --srs From: mailop <mailop-boun...@mailop.org> on behalf of Vaibhav via mailop <mailop@mailop.org> Sent: Wednesday, May 12, 2021 10:02:52 PM To: mailop <mailop@mailop.org> Subject: [mailop] Reg. delivery issues at Yahoo ISP Hi Everyone, Has anyone observed delivery issues with Yahoo ? Recently in the past one week we observed below delivery issues at Yahoo ISP. 1 ) TSS04 delivery issue. ( Known for some time now ) - With dedicated delivery IPs , Newly onboarded customers , Customer sending triggered / transactional volume. We do the same issue with different mail streams. 2 ) Inbox delivery issue : - Email is getting filtered as spam where in history we didn't observe any such deviation. Lots of triggered / transactional emails are getting filtered as spam where we don't see any throttling on dedicated IP space. Does anyone have any inputs ? How do we address this issue? as we are not getting the right inputs for the Yahoo Postmaster team. --Vaibhav _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
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