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Emails to @gmail.com bounce back, complaining about missing PTR records?

Anonymous
2024-05-27T14:10:02+00:00

Hello,

I get the following bounceback to my emails:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  .........@gmail.com
    host gmail-smtp-in.l.google.com [108.177.15.27]
    SMTP error from remote mail server after end of data:
    550-5.7.25 [185.220.184.44] The IP address sending this message does not have a
    550-5.7.25 PTR record setup, or the corresponding forward DNS entry does not
    550-5.7.25 match the sending IP. As a policy, Gmail does not accept messages
    550-5.7.25 from IPs with missing PTR records. For more information, go to
    550-5.7.25  https://support.google.com/a?p=sender-guidelines-ip
    550-5.7.25 To learn more about Gmail requirements for bulk senders, visit
    550 5.7.25  https://support.google.com/a?p=sender-guidelines. ffacd0b85a97d-35588e5b6ecsi4073213f8f.1019 - gsmtp

The domain i'm sending the e-mails from is @....com.

It's a work account.

The problem started about 2 weeks ago.

I'm checking the e-mail with the outlook e-mail app on desktop.

Awaiting your reply.

Thanks,

Alice

Outlook | MacOS | Legacy Outlook for Mac | For home

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  1. Anonymous
    2024-05-27T16:01:58+00:00

    Dear OFWALT,

    Thanks for choosing Microsoft Community.

    Based on the error message you provided, it seems that the PTR record for your server's IP address is not set up correctly or is not pointing to the correct hostname. So check with other users in your organization and check whether they also meet this. If so, for this, you can try the following steps to troubleshoot the issue:

    1. Verify that the PTR record for your server's IP address is set up correctly and is pointing to the correct hostname. You can use a tool like MXToolbox to check the PTR record for your server's IP address. Once the PTR record is set up, it may take up to 24-48 hours for the changes to propagate.
    2. Make sure that the forward DNS entry for the hostname specified in the PTR record is pointing to the correct IP address.

    Hope this can help. If there is any update, please feel free to let me know. I will continue to help you based on the information you provide. Your understanding and co-operation are highly appreciated.

    Thanks for your precious time. Have a nice day.

    Sincerely

    Katherine

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