Topic: Can't receive mails from specific domain

[nuxero]

Hello. I recently started to work for a company as a server administrator. There is a mail server using SME Server 9.0

The problem is that the users doesn´t receive mails from an specific foo.com.sv domain, the sending is ok to that and other domains and receiving from another domains is also ok.

Reading the documentation I see that the SME Server has qpsmtpd for receiving mails, Spamassasin for Spam and ClamAV for virus so I started to check logs and configurations files. First I looked for a blacklist-type of configuration but couldn't find anything and the from qpsmtd logs I get:

Code: [Select]

2015-09-07 15:00:04.332645500 9171 dispatching RCPT TO: <ccarcamo@mnf.com.sv>
2015-09-07 15:00:04.334141500 9171 250 <ccarcamo@mnf.com.sv>, recipient ok
2015-09-07 15:00:05.801056500 9171 logging::logterse plugin (queue): ` 192.168.2.209 pc-00209.aldesa.com.sv PCINF05 <veronicaflores@aldesa.com.sv> <ccarcamo@mnf.com.sv> queued <00ef01d0e9b0$2af04650$80d0d2f0$@aldesa.com.sv>

mnf.com.sv is the problematic domain. I have already search in the forum similar problems with no answer, hope you can help me.

[CharlieBrady]

The sysadmin of mnf.com.sv might need to help you, if there are no relevant logs on your server. What do they see when they try to send a message your way?

The log you showed shows a successful receipt by qpsmtpd of a message from your LAN, being sent to ccarcamo@mnf.com.sv. Where it says "queued", that means the message was handed to qmail, which presumably sent the message.

[nuxero]

Thanks for the answer.

I will contact the mnf sysadmin. I discovered that my mail server (and any other computer) is unable to resolve mnf.com.sv domain and also require_resolvable_fromhost is enabled, so I'm suspecting that is why the mails are being rejected.

[janet]

nuxero

In FF I get this:

The following error was encountered while trying to retrieve the URL: http://mnf.com.sv/

    Unable to determine IP address from host name "mnf.com.sv"

The DNS server returned:

    No DNS records