Could someone from Microsoft and Yahoo help me resolve this issue with 209.16.157.42?
550 5.7.1 Unfortunately, messages from [209.16.157.42] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [AM5EUR02FT039.eop-EUR02.prod.protection.outlook.com] 553 5.7.2 [TSS09] All messages from 209.16.157.42 will be permanently deferred; Retrying will NOT succeed. See https://help.yahoo.com/kb/postmaster/SLN3436.html The /24 network that the server is located in was purchased and moved from ARIN to RIPE on 2020-06-30 [1]. (Our new ISP was unable to supply more than 1 IPv4 address.) The network hasn't been routed since 209.16.128.0/18 was advertised until 2017-12 by the original legacy IP holder [2]. None of the IPs are on any DNS lists, so I can only assume there's some kind of "newly announced" restriction or "route origin changed" check that is preventing it from being allowed to send any email. Microsoft was previously returning 4xx for 47 hours and then either disappearing the email or delivering it to Spam but now just returns 5xx. Yahoo has always returned 5xx. Google are accepting messages. The advice in the URLs in the error messages are meaningless because I have no "outgoing emails" to review if they're never accepted. This domain has SPF/DKIM/DMARC configured and the network is registered with SNDS/JMRP. I don't get anything but automated or template responses from Microsoft or Yahoo support. I have 5 users in total (including myself) and don't operate any mailing lists. This issue is frustrating when emails to Sky/AOL/Hotmail/etc. all bounce. 1. Aside from the creation date in RIPE WHOIS, here's the RIPE list of IPv4 transfers for proof that this was transferred (and when): https://www-static.ripe.net/dynamic/table-of-transfers/inter-rir/incoming-ipv4.json {"transferred_blocks":"209.16.157.0/24", "date":"30/06/2020", "transferType":"POLICY", "from_rir":"ARIN", "to_organisation":"Edinburgh Hacklab Ltd"} 2. https://stat.ripe.net/209.16.157.0%2F24#tabId=routing -- Simon Arlott _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
