> On Aug 12, 2016, at 1:53 PM, Seth Charles via mailop <[email protected]> > wrote: > > Hello, > We're running into a strange issue I'm wondering if anyone on this list has > seen before. > > We have a client that is running into blocks at Gmail, and the reason given > is, "550 5.7.1 [167.89.88.20] The IP address sending this message does not > have a PTR record setup. As a policy, Gmail does not accept messages from IPs > with missing PTR records. Please visit > https://support.google.com/mail/answer/81126#authentication for more > information." > > That's all fine, but we have verified through terminal digs as well as tools > like the Reverse Lookup at MXToolbox that there is a PTR record in place and > does point back to the proper value. > > Terminal: (host 167.89.88.20 > 20.88.89.167.in-addr.arpa domain name pointer > o1.webmaillist.flowerdeliveryexpress.com.) > > MXToolbox: > Type IP Address Domain Name TTL > PTR 167.89.88.20 o1.webmaillist.flowerdeliveryexpress.com 15 min > > The two affected IPs are: > 167.89.88.20 > > 167.89.89.136 > > Anyone running into similar issues or have any insights?
Neither o1.webmaillist.flowerdeliveryexpress.com nor o2.webmaillist.flowerdeliveryexpress.com. exist, in an A or AAAA sense. They also have DNS wildcard hosted by cloudflare, which has all sorts of weird (protocol violating?) behaviour, so there could be other problems. Cheers, Steve _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
