1

Topic: I cant send email to other domain invalid DNS PTR resource record

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
====
Hi
After i send an email i receive something like this,

Undelivered Mail Returned to Sender

This is the mail system at host ab1insurancebrokers.co.tz.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<p.mwanga@p4se.com>: host mx00.kundenserver.de[212.227.15.134] refused to talk
    to me: 554-kundenserver.de (mxeue002) Nemesis ESMTP Service not available
    554-No SMTP service 554 invalid DNS PTR resource record

Reporting-MTA: dns; ab1insurancebrokers.co.tz
X-Postfix-Queue-ID: 0FB0D143959
X-Postfix-Sender: rfc822; root@ab1insurancebrokers.co.tz
Arrival-Date: Wed, 17 Sep 2014 11:10:09 -0400 (EDT)

Final-Recipient: rfc822; p.mwanga@p4se.com
Original-Recipient: rfc822;p.mwanga@p4se.com
Action: failed
Status: 4.0.0
Remote-MTA: dns; mx00.kundenserver.de
Diagnostic-Code: smtp; 554-kundenserver.de (mxeue002) Nemesis ESMTP Service not
    available 554-No SMTP service 554 invalid DNS PTR resource record

Subject     hi
From     root@ab1insurancebrokers.co.tz
To     p.mwanga@p4se.com
Date     Today 08:10

first mail

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2

Re: I cant send email to other domain invalid DNS PTR resource record

What's your source IP? The bounce back message you received stated that the sender IP doesn't have a PTR record.

3

Re: I cant send email to other domain invalid DNS PTR resource record

My ip address is 104.131.47.108

4

Re: I cant send email to other domain invalid DNS PTR resource record

As mentioned in your error message, you don't have your PTR record set for your IP address and therefore your mails are rejected.
http://i61.tinypic.com/2ag562x.png

You can either add a PTR record to your IP from your IP hosting company, or simply relay your email via your ISP's mail server. Usually they have a PTR record set for their IP addrs.