delivery to gmail failed : "sending IP must have a PTR record" · Issue #236 · nodemailer/nodemailer · GitHub
![SOLVED] Exchange 2016 PTR records for IPv6 - DNS](https://content.spiceworksstatic.com/service.community/p/post_images/0000367972/5d532fdc/attached_image/Capture3.png "SOLVED] Exchange 2016 PTR records for IPv6 - DNS")
SOLVED] Exchange 2016 PTR records for IPv6 - DNS
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This message does not meet IPv6 sending guidelines regarding PTR 550-5.7.1 records and authentication - Maintenance - Mail-in-a-Box Forum
This message does not meet IPv6 sending guidelines regarding PTR 550-5.7.1 records and authentication - Maintenance - Mail-in-a-Box Forum
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خطا n550-5.7.1 not meet IPv6 sending guidelines regarding PTR records - میهن هاستینگ
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