Unauthenticated email

[rafael.martinez]

Hello, good afternoon

One of my users is having the following email bounce:

550 5.7.26 Unauthenticated email from xxxxxxx.net is not accepted due to domain's DMARC policy. Please contact the administrator of xxxxxxx.net domain if this was a legitimate mail. Please visit https://support.google.com/mail/answer/2451690 to learn about the DMARC initiative. n18-20020a81af12000000b002dc14577af0sor4696524ywh.78 - gsmtp

Please help me solve this bounce.

Greetings.

 

[ffeingol]

Does the domain have a SPF record published? We've found Google mail has become very picky if SPF is not published for a domain.

 

[cPRex]

Hey there! It sounds like the domain has a DMARC policy in place that rejects messages under certain conditions. Is this an email you sent from your server?

Google is getting more strict about their rules, and you can see more here:

Help prevent spoofing and spam with DMARC - Google Workspace Admin Help

Protect against spoofing & phishing, and help prevent messages from being marked as spam Tip: Google Workspace uses 3 email standards to help prevent spoofing and phishing of your organization’s G

support.google.com

 

[techAMIGO]

Hey,
It seems you need to check the dmarc txt record for the domain and make it more liberal like
_dmarc IN TXT 'v=DMARC1; p=none' or if you need to get report of failures make it as 'v=DMARC1; p=none; rua=mailto:email-id-of-report; ruf=email-id-of-report'

 

[Maxin John]

Hey,
It seems you need to check the dmarc txt record for the domain and make it more liberal like
_dmarc IN TXT 'v=DMARC1; p=none' or if you need to get report of failures make it as 'v=DMARC1; p=none; rua=mailto:email-id-of-report; ruf=email-id-of-report'

Yes , they need to check their domains dmarc record.