The sender got the returned error when sending email to my domain email. Why?

[Tommyhara]

Hello Directadmin support staff

Can you tell me what is this error and how to solve it?

a sender sent an email to me and he got the returned error with following info

Date: Thu, 08 Oct 2015 22:32:56 -0400 Download Mail delivery failed: returning message to sender.msg
From: Mail Delivery System <[email protected]> Import addresses Mailer-
[email protected] Block email [email protected] Block SMTP
relay server.mydomain.com
To: [email protected]
Subject: Mail delivery failed: returning message to sender All headers

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:

[email protected]
(ultimately generated from [email protected])
SMTP error from remote mail server after end of data:
host gmail-smtp-in.l.google.com [2607:f8b0:400d:c04::1b]:
550-5.7.1 [2607:5300:60:2e27::] Our system has detected that this message does
550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
550-5.7.1 authentication. Please review
550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more
550 5.7.1 information. 9si42679878qgt.30 - gsmtp

I changed my real domain to mydomain.com (in quote above)

Please let me know is this error from Directadmin or I missed out somethings on the configs?


Thanks in advanced

 

[zEitEr]

Hello,

That's bounced email from Gmail. IPv6 of directadmin server (I guess email was sent via directadmin server) does not have reverse DNS (i.e. PTR record). That is what the message says, read the SMTP error report.

Usually PTR record can be change by a request to a hosting company from which you rent a server, or through their control panel.