Email problems

Posted on 2008-11-05
Last Modified: 2013-11-30
I have a customer that is getting the following error when he sends us an email:

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:
    The mail server could not deliver mail to  The account or domain may not exist, they
may be blacklisted, or missing the proper dns entries.

I ran a test from on the email address, see below.

Results from Test Email Address:
Please Wait....

You entered:
Testing SMTP Server: NO UCE ESMTP server ready
ehlo hello [], pleased to meet you
250-SIZE 34603008
250 OK
mail from:250 2.1.0  sender ok
rcpt to:250 2.1.5  recipient ok
221 2.0.0 NO UCE closing connection
Got 250 response, is accepting email got the domain

The address is not blacklisted and I can't find any problems with my DNS entries. Can anyone please give me some insight on what I can do to fix this problem even if it is not on my end.
Question by:rmills8387
    LVL 9

    Expert Comment

    Okey Dokey,

    A ping to replies correctly with:

    Reply from bytes=32 time=155ms TTL=242
    Reply from bytes=32 time=166ms TTL=242

    no probs there.

    Going to  works fine.

    However comes up with Bad Request (This is probably because of a missing host headder in IIS)

    trying to talk directly to your mail server on port 25 also fails for the following:

    telnet 25 - fails
    telnet 25 - fails
    telnet 25 - fails

    It would normally be a good idea to have these entries, but it looks to me as though your DNS for this domain is not complete:

    It's looks like your domain DNS name servers are being hosted by, it looks well set up apart from on flaw that breaks RFC regulations and causes a fail.

    A great tool for checking your DNS is here:

    You can see where it fails in the report, fix this and you should be up and running. Are you hosting email for you domain yourself or is your ISP?

    All the best
    Sci-Fi Si

    Author Comment

    Thanks Sci-Fi S1

    Our email is being hosted by someone else, not our ISP. I made the changes and the test results look good.

    I will have our client send a test email tomorrow to see what happens.
    Thanks for your help and I will let you know the results.


    LVL 9

    Expert Comment

    No probs.

    LVL 9

    Accepted Solution

    Just telnetted to your mail server with success! This is good news.


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