Even though this is not a postfix specific issue I was hoping someone in the community could help with this issue.
We recently changed IP addresses as we purchased a /24 to use as we plan to move Internet service provides in the near future. Once we did this we now get the following from yahoo.com when trying to send email to anyone on their system. some...@yahoo.com [mailto:some...@yahoo.com]: host mta7.am0.yahoodns.net[67.195.229.59] said: 553 5.7.2 [TSS09] All messages from x.x.x.x will be permanently deferred; Retrying will NOT succeed. See https://help.yahoo.com/kb/postmaster/SLN3436.html [https://help.yahoo.com/kb/postmaster/SLN3436.html] (in reply to MAIL FROM command) We have insured that we have forward and reverse dns setup correctly. We do DMARC, DKIM and SPF for the email we send out. I have sent several requests via the yahoo postmaster portal to resolve this but it has been weeks now with no resolution. The portal is more for yahoo.com users and not bulk email senders like us. We don't send spam or marketing emails. We do have websites that send out newsletters, alerts and business email. Does anyone have any ideas or suggestions or even know of a service that can help with these types of issues?
