1 Topic by duy_dang2110

  • duy_dang2110
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Topic: Delivery has failed to these recipients or groups

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Hi all ,
When I sent mail to a group mail I get the return message "Delivery has failed to these recipients or groups"  #< #5.1.1 X-Postfix; unknown user: "ngoc"> #SMTP# . I have checked that group many times , it's not content  "ngoc" user , "ngoc" user doesn't even exist on my system .

Here is my error message :
Delivery has failed to these recipients or groups:
UMDM@mydomain.com  ####### the mail group
The e-mail address you entered couldn't be found. Please check the recipient's e-mail address and try to resend the message. If the problem continues, please contact your helpdesk.

Diagnostic information for administrators:
Generating server: mail.mydomain.com
UMDM@mydomain.com
#< #5.1.1 X-Postfix; unknown user: "ngoc"> #SMTP#
Original message headers:
Return-Path: <mymail@mydomain.com>
Received: from localhost (localhost [127.0.0.1])
        by mail.mydomain.com (Postfix) with ESMTP id ADAFF340EAA
        for <ngoc@mail.mydomain.com>; Tue, 24 Feb 2015 14:48:01 +0700 (ICT)
X-Virus-Scanned: amavisd-new at mail.mydomain.com
Received: from mail.mydomain.com ([127.0.0.1])
        by localhost (mail.mydomain.com [127.0.0.1]) (amavisd-new, port 10024)
        with ESMTP id bZC1z_Tflctk for

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: Delivery has failed to these recipients or groups

Please double check your group members, make sure all members are valid email addresses.

3 Reply by duy_dang2110 (edited by duy_dang2110 2015-02-25 22:15:23)

  • duy_dang2110
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Re: Delivery has failed to these recipients or groups

I did the double check with group members as you suggest , all members are valid. The user include in the error message I don't know where it come from .

4 Reply by ZhangHuangbin

  • ZhangHuangbin
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Re: Delivery has failed to these recipients or groups

Does any member forward email to this invalid user?

5 Reply by duy_dang2110 (edited by duy_dang2110 2015-02-26 00:03:41)

  • duy_dang2110
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Re: Delivery has failed to these recipients or groups

The group content alot of users , have you got any idle to check it from the server side ? .  If there is an member that forward email to invalid user , the error message would send to that member .

6 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: Delivery has failed to these recipients or groups

You can try SQL query with SQL  command line tool or tools like phpMyAdmin:

mysql> USE vmail;
mysql> SELECT address FROM alias WHERE goto LIKE '%ngoc%';

7 Reply by duy_dang2110 (edited by duy_dang2110 2015-02-26 14:36:12)

  • duy_dang2110
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Re: Delivery has failed to these recipients or groups

I got it , something wrong with goto column , it only content user name without domain . Thank for your great support .