Plesk / malleable SMPT Problem

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MaikelO
Posts: 1
Joined: Mon Nov 02, 2015 2:22 pm

Plesk / malleable SMPT Problem

Post by MaikelO » Mon Nov 02, 2015 2:33 pm

hello, I'm desperate ... We rent a virtual server with Plesk.

In the past we have been on a spam list, but now all the lists on our ipaddres are clean.

We have now been a month further and our SMTP mail server still does not work.

Does anyone have a tip?

Service > SMTP> LastError
The socket connection to the remote host failed. The host was either not contactable or it rejected your connection.
(http://kb.odin.com/en/121457)
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MailEnable-Ian
Site Admin
Posts: 9220
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Plesk / malleable SMPT Problem

Post by MailEnable-Ian » Wed Nov 04, 2015 5:11 am

Hi,

Most likely the rejections are occurring because your reverse DNS record (PTR) for ourbrand.nl is incorrect. Please nslookup results below:

Non-authoritative answer:
Name: ourbrand.nl
Address: 81.169.137.219

> set type=mx
> ourbrand.nl
Server: hyper.mailenable.com.au
Address: 192.168.2.109

Non-authoritative answer:
ourbrand.nl MX preference = 20, mail exchanger = fallback.axc.nl
ourbrand.nl MX preference = 10, mail exchanger = mail.ourbrand.nl

fallback.axc.nl internet address = 159.253.5.241
mail.ourbrand.nl internet address = 81.169.137.219
> set type=ptr
> 81.169.137.219
Server: hyper.mailenable.com.au
Address: 192.168.2.109

Non-authoritative answer:
219.137.169.81.in-addr.arpa name = h2415783.stratoserver.net

As you can see above the PTR record is resolving to h2415783.stratoserver.net and not mail.ourbrand.nl and would explain why Gmail is rejecting your inbound messages.
Regards,

Ian Margarone
MailEnable Support

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