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: TypeIP AddressDomain NameTTL PTR 167.89.88.20 <http://mxtoolbox.com/SuperTool.aspx?action=a%3ao1.webmaillist.flowerdeliveryexpress.com.&run=networktools#> o1.webmaillist.flowerdeliveryexpress.com <http://mxtoolbox.com/SuperTool.aspx?action=a%3ao1.webmaillist.flowerdeliveryexpress.com.&run=networktools#> 15 min The two affected IPs are: 167.89.88.20 167.89.89.136 Anyone running into similar issues or have any insights? Seth Charles -- *Seth Charles* Delivery Consultant | Email Delivery Interested in learning the latest email best practices or improving your email program's delivery? Start *HERE <https://sendgrid.com/solutions/expert-services>*
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