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I ran our domain through MXToolbox, and this error comes up several times: "Reverse DNS does not match SMTP Banner".

We use G Suite for our email and Cloudflare for DNS. Can I fix these warnings from MXtoolbox? Since I obviously don't run the SMTP server (Google does), I'm thinking these aren't fixable.

Thanks!

Maxime
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user1159415
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3 Answers3

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This warning is not a serious problem, and in most cases, it will not prevent your emails from being delivered. However, some mail servers may use this as an indication of a possible spam source in a scoring system. This means that your emails may be more likely to be marked as spam or even rejected outright.

to fix this you have to contact the Workspace / Google support to have them update the PTR record.

user103373
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They're saying that your forward lookups (A) don't match your reverse lookups(PTR). Talk to your ISP, they can edit them or give you the tools to do it.

Larryc
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Those are warnings not errors right?

It would implicate to many drawbacks on a working protocol to have this required.

Discussion here too: Do internet standards require reverse DNS for every device?

Zenin
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