Mail delivery failed: returning message to sender

[rakesh]

i newly install vestacp and after installing i send mail from roundcube its return and show

"Mail delivery failed: returning message to sender"

this mail

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]
SMTP error from remote mail server after end of data:
host gmail-smtp-in.l.google.com [2607:f8b0:400c:c06::1b]:
550-5.7.1 [2602:ffc5::b92a:a2e9] 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 ... tion_error for more
550 5.7.1 information. i129si1126957vke.84 - gsmtp

------ This is a copy of the message, including all the headers. ------

Return-path: <[email protected]>
Received: from admin by server.dailynewsreporter.in with local (Exim 4.72)
(envelope-from <[email protected]>)
id 1adCmg-0005dh-Ph
for [email protected]; Tue, 08 Mar 2016 03:14:26 -0500
To: [email protected]
Subject: rakesh
X-PHP-Originating-Script: 0:rcube.php
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII;
format=flowed
Content-Transfer-Encoding: 7bit
Date: Tue, 08 Mar 2016 13:44:26 +0530
From: [email protected]
Message-ID: <[email protected]>
X-Sender: [email protected]
User-Agent: Roundcube Webmail/1.1.4


plj help me why this error happning

[tjebbeke]

Code: Select all

550-5.7.1 [2602:ffc5::b92a:a2e9] 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 ... tion_error for more
550 5.7.1 information. i129si1126957vke.84 - gsmtp

You need to add your IPV6 address to your SPF record.

[skurudo]

Or that all because of the next ACL rule:

Code: Select all

deny message = smtp auth requried
     sender_domains = +local_domains
     !authenticated = *

But you can't disable it because your MX become an open relay for every message sent from your domain. The best solution is to submit directly from client to the MX. While port 25 can be blocked by ISP ports 465 and 587 sould be opened for SMTPS/SMA. You have to configure clients properly. (c) http://serverfault.com/questions/770016 ... ired-error