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Thread: 451 4.3.0 error: queue file write error when sending emails, even after having NIS 2012

  1. #1
    Join Date
    May 2012
    Posts
    41

    451 4.3.0 error: queue file write error when sending emails, even after having NIS 2012

    Whenever I am trying to send an email message, I am getting below mentioned error message
    4.3.0 error: queue file write error
    I am running Windows 7 computer with NIS 2012 installed. Can you tell me why above mentioned issue is happening? Any solution to overcome will be greatly appreciated. Thanks a lot in advance.

  2. #2
    Join Date
    May 2011
    Posts
    379

    Re: 451 4.3.0 error: queue file write error when sending emails, even after having NIS 2012

    After looking on the error message, I guess it is something related to the email provider. I don’t think it is related to Norton. You should check it out whether they had made any changes into SMTP port number. However to confirm whether it is Norton is causing any issue , you should do the following.

    Click Settings, Click Network, Click Message Protection, Click Email Antivirus Scan Configure[+].

    The above mentioned steps would simply turn off email scanning and Norton would prompt about the same as well. Now try to send emails and let me know about the same.

  3. #3
    Join Date
    Jul 2011
    Posts
    398

    Re: 451 4.3.0 error: queue file write error when sending emails, even after having NIS 2012

    Well I have found many people who are getting same issue while sending email using Postfix. So far I am aware of couple of solutions that I would like to tell you about.

    Look for the latest version of Postfix and update with the same. Second thing which you can try is simply set message size limit parameter. You can do by using following steps.
    Launch /etc/postfix/main.cf config file by running
    Code:
    vi /etc/postfix/main.cf
    Code:
     message_size_limit = 20971520
    it will set message_size_limit to 20971520 bytes

    After doing the same simply restart postfix mail server by running following command.
    Code:
    # /etc/init.d/postfix restart

  4. #4
    Join Date
    Jul 2011
    Posts
    381

    Re: 451 4.3.0 error: queue file write error when sending emails, even after having NIS 2012

    KirtiPatel
    In this particular situation I am suggesting to run postfix into verbose mode and see whether any error message is occurred. You will need to edit /etc/postfix/master.cf file.
    You have to find out ‘smtp inet n - - - - smtpd -o smtpd_proxy_filter=127.0.0.1:10025’ and make following changes
    Code:
    smtp inet n - - - - smtpd -v -o smtpd_proxy_filter=127.0.0.1:10025
    After that run below mentioned command.
    Code:
    # postfix reload
    Alos make changes into /etc/postfix/master.cf.
    Code:
    smtp inet n - - - - smtpd -v -o smtpd_proxy_filter=127.0.0.1:10026
    It would disable internal proxy, greylisting and antivirus. See whether it makes any difference into the situation.

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