Scalix Forums

One of my users keeps getting this error message when sending to these two internal email address's. Any ideas what could be causing this. And yes the email address is correct.

-----Original Message-----
From: MAIL-SYSTEM
Sent: Tuesday, June 27, 2006 9:22 AM
To: Tricia Croce
Subject: Returned mail: see transcript for details

----------------------------- ERROR REPORT ----------------------------- Message could not be delivered to the following recipient:

'cmoore / internet
DDT1=RFC-822;
DDV1='cmoore@carolinamoneysaver.com';

because: Unknown Non-Delivery Reason (512)

------------------------------------------------------------------------
Message could not be delivered to the following recipient:

'wlittle / internet
DDT1=RFC-822;
DDV1='wlittle@carolinamoneysaver.com';

because: Unknown Non-Delivery Reason (512)
------------------------------------------------------------------------

5.1.2 usually indicates a DNS problem.

Are you able to send to those addresses OK ? I'm guessing that they are external to your domain.

Cheers

Dave

actually there internal, but i'll give my dns server a kick and let you know if it works

We are having the same problem but with sending to an external address.

We have not had too many problems with addresses from outside the U.S but could there be a problem with this domain (gruposimoldes.com.pt)?

Our Linux DNS server seems to resolve only for the MX record. Restarting the DNS server retains the associated A record for only a short time before dropping it.

Our Windows 2003 server is not dropping the A record so I revised the /etc/resolv.conf file listing the Windows server first with the Linux server second.

The Scalix server still does not want to deliver to this domain and we get the following error:

----------------------------- ERROR REPORT -----------------------------
Message could not be delivered to the following recipient:

*** address omited for privacy ***

because: Unknown Non-Delivery Reason (512)
------------------------------------------------------------------------

The address in question is deliverable from my outside Comcast email account.

This is most likely a remote server issue. From the command prompt of the Scalix server, try to telnet to the destination host and see if you can pipe a message in using telnet on port 25. An unknown reason is often given for remote hosts refusing messages due to listings in RBLs like spamcop.net or dynamic dialup ranges.

Alternatively, turn on sendmail debugging and have a look at the conversation.

Cheers,

Sascha.