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  1. #1

    HELP! Email not sending from server / 550 - Verification/Sender failed

    Started having email issues on my server last Friday. Several clients reported that the Mailer-Daemon was bouncing back emails. SO I tried of two different hosted accounts to send email with a test account I set up. I got the same result off of both, even after restarting Exim. Here is the bounce back email -
    Code:
    Subject:  Mail delivery failed: returning message to sender 
    
    This message was created automatically by mail delivery software.
    
    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:
    
      jschup@sx.com
        SMTP error from remote mail server after RCPT TO:<jschup@sx.com>:
        host sx.com [209.xxx.xxx.xxx]: 550-Verification failed for <jstest@testhost.com>
        550-No Such User Here"
        550 Sender verify failed
    
    ------ This is a copy of the message, including all the headers. ------
    
    Return-path: <jstest@testhost.com>
    Received: from localhost ([127.0.0.1])
            by server1.com with esmtpa (Exim 4.69)
            (envelope-from <jstest@testhost.com>)
            id 1R3FkQ-0001PN-6f
            for jschup@sx.com; Mon, 12 Sep 2011 18:16:43 -0500
    Received: from 99.xxx.xxx.xxx ([99.xxx.xxx.xxx]) by 64.xxx.xxx.xxx (Horde
     Framework) with HTTP; Mon, 12 Sep 2011 18:17:06 -0500
    Message-ID: <20110912181706.66494ty53ckwhr00@64.xxx.xxx.xxx>
    Date: Mon, 12 Sep 2011 18:17:06 -0500
    From: jstest@testhost.com
    To: jschup@sx.com
    Subject: Email test2
    MIME-Version: 1.0
    Content-Type: text/plain;
     charset=ISO-8859-1;
     DelSp="Yes";
     format="flowed"
    Content-Disposition: inline
    Content-Transfer-Encoding: 7bit
    User-Agent: Internet Messaging Program (IMP) H3 (4.3.9)
    
    Email from cpanel off of the server
    I then ran and exim command to check the two accouts and got this result -
    Code:
    [root@server1 /]# exim -bt jstest@testhost.com
    jstest@testhost.com
      router = virtual_user, transport = virtual_userdelivery
    
    [root@server1 /]# exim -bt jstest@testhost2.com
    jstest@testhost2.com
      router = virtual_user, transport = virtual_userdelivery
    Any suggestions?
    Thanks, D.

  2. #2
    Join Date
    Aug 2011
    Location
    India
    Posts
    288
    Hello
    Please ensure that the sending domain/server has a valid rDNS (PTR) record and is not listed in RBL.
    Fred Bruner
    Business Analyst
    SupportSages.com- Bytes of Wisdom @ Work - Where guarantees and promises are made to keep!
    24/7 Support with 15 mins response time & no charge guarantees

  3. #3
    Look what server is telling you:
    "550-No Such User Here"
    Which means user "jschup@sx.com" was not found in the mail server.

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