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421 invalid sender domain

Discussion in 'E-mail Discussions' started by Mazer, Jul 26, 2010.

  1. Mazer

    Mazer Member

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    I have some problems with mail in WHM; it appears to fail at points and I have difficulty locating a solution:

    Code:
    Message 1OdGN2-0004Fy-Ms is not frozen
    delivering 1OdGN2-0004Fy-Ms
    Connecting to mx01.1and1.co.uk [212.227.15.150]:25 ... connected
      SMTP<< 220 mx-b.kundenserver.de (mxbap4) Welcome to Nemesis ESMTP server
      SMTP>> EHLO xxxx.rsclientdns.com
      SMTP<< 250-mx-b.kundenserver.de
             250-PIPELINING
             250-8BITMIME
             250-SIZE 120000000
             250 HELP
      SMTP>> MAIL FROM:<nobody@xxxxx.rsclientdns.com> SIZE=2383
      SMTP>> RCPT TO:<xxxx@xxxxx.co.uk>
      SMTP>> DATA
      SMTP<< 250 OK
      SMTP<< 421 invalid sender domain 'xx.rsclientdns.com' (misconfigured dns?)
    LOG: MAIN
      SMTP error from remote mail server after RCPT TO:<xxx@xxxxr.co.uk>: host mx01.1and1.co.uk [212.227.15.150]: 421 invalid sender domain 'mcm.rsclientdns.com' (misconfigured dns?)
      SMTP<< 554 No valid recipients
      SMTP>> QUIT
    Connecting to mx01.1and1.co.uk [212.227.15.186]:25 ... connected
      SMTP<< 220 mx-b.kundenserver.de (mxbap2) Welcome to Nemesis ESMTP server
      SMTP>> EHLO xxx.rsclientdns.com
      SMTP<< 250-mx-b.kundenserver.de
             250-PIPELINING
             250-8BITMIME
             250-SIZE 120000000
             250 HELP
      SMTP>> MAIL FROM:<nobody@xxx.rsclientdns.com> SIZE=2383
      SMTP>> RCPT TO:<rxxx@xxxxr.co.uk>
      SMTP>> DATA
      SMTP<< 250 OK
      SMTP<< 421 invalid sender domain 'xx.rsclientdns.com' (misconfigured dns?)
    LOG: MAIN
      SMTP error from remote mail server after RCPT TO:<rrpd@robinsonanddicker.co.uk>: host mx01.1and1.co.uk [212.227.15.186]: 421 invalid sender domain 'xx.rsclientdns.com' (misconfigured dns?)
      SMTP<< 554 No valid recipients
      SMTP>> QUIT
    Connecting to mx01.1and1.co.uk [212.227.15.169]:25 ... connected
      SMTP<< 220 mx-b.kundenserver.de (mxeu5) Welcome to Nemesis ESMTP server
      SMTP>> EHLO xxx.rsclientdns.com
      SMTP<< 250-mx-b.kundenserver.de
             250-PIPELINING
             250-8BITMIME
             250-SIZE 120000000
             250 HELP
      SMTP>> MAIL FROM:<nobody@xxx.rsclientdns.com> SIZE=2383
      SMTP>> RCPT TO:<xxx@xxxx.co.uk>
      SMTP>> DATA
      SMTP<< 250 OK
      SMTP<< 421 invalid sender domain 'xxx.rsclientdns.com' (misconfigured dns?)
    LOG: MAIN
      SMTP error from remote mail server after RCPT TO:<xxx@xxx.co.uk>: host mx01.1and1.co.uk [212.227.15.169]: 421 invalid sender domain 'mcm.rsclientdns.com' (misconfigured dns?)
      SMTP<< 554 No valid recipients
      SMTP>> QUIT
    Connecting to mx01.1and1.co.uk [212.227.15.134]:25 ... connected
      SMTP<< 220 mx-b.kundenserver.de (mxeu5) Welcome to Nemesis ESMTP server
      SMTP>> EHLO mcm.rsclientdns.com
      SMTP<< 250-mx-b.kundenserver.de
             250-PIPELINING
             250-8BITMIME
             250-SIZE 120000000
             250 HELP
      SMTP>> MAIL FROM:<nobody@xxx.rsclientdns.com> SIZE=2383
      SMTP>> RCPT TO:<xxxx@xxxxr.co.uk>
      SMTP>> DATA
      SMTP<< 250 OK
      SMTP<< 421 invalid sender domain 'xxx.rsclientdns.com' (misconfigured dns?)
      SMTP<< 554 No valid recipients
      SMTP>> QUIT
    LOG: MAIN
      == xxx@rxxx.co.uk R=lookuphost T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<xxx@xxx.co.uk>: host mx01.1and1.co.uk [212.227.15.134]: 421 invalid sender domain 'xxx.rsclientdns.com' (misconfigured dns?)
    
    
     
  2. crazyaboutlinux

    crazyaboutlinux Well-Known Member

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    I've found 2 errors in the error logs

    SMTP<< 421 invalid sender domain 'xxx.rsclientdns.com' (misconfigured dns?)
    SMTP<< 554 No valid recipients

    Kindly get this checked whether DNS is proper setup or not

    And also recipients email id is invalid

    554 No valid recipients
     
  3. Mazer

    Mazer Member

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    All the nameservers resolve and all domains are working. The host of this server has a seperate nameserver that then sends them to our server.
     
  4. dreas

    dreas Active Member

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    Location:
    Amsterdam, The Netherlands
    SMTP<< 554 No valid recipients: This has nothing to do with your server. 1und1 is rejecting the email because the recipient doesn't exist.


    SMTP<< 421 invalid sender domain 'xx.rsclientdns.com' (misconfigured dns?): It appears the sending domain doesn't resolve. I presume xx.rsclientdns.com is a fake domain? Can you PM the real log so I can check it for you?
     
  5. Mazer

    Mazer Member

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    I have it sorted now - creating name servers and mx entries on the site were moot as they were resolved elsewhere, logged into hosting site and resolved the issue

    is there a mark as solved type thing on this forum?
     
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