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Problem sending to email, getting sender verify failed

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  • fajar
    Hi, I have a problem sending email to particular domains that manage by an ISP. All email get rejected by this ISP mail server, eventhough the email status
    Message 1 of 4 , Aug 3, 2008
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      Hi,

       

      I have a problem sending email to particular domains that manage by an ISP. All email get rejected by this ISP mail server, eventhough the email status already “SENT” in postfix maillog. Is there any action that I need to do to make my postfix can working well with this ISP mail server? I think they using Exim.

       

      ----- Original Message -----

      From: "Mail Delivery System" <MAILER-DAEMON@...>

      To: <xxx@...>

      Sent: Friday, August 01, 2008 2:40 PM

      Subject: Delivery Status Notification (Failure)

       

       

      The following message to <yyy@...> was undeliverable.

      The reason for the problem:

      5.4.7 - Delivery expired (message too old) [Default] 451-'Sender verify

      failed'

       

      Thanks

      Fajar

    • Charles Marcus
      ... Why are you using sender verification? You should NOT use SAV for all messages, only for messages destined to domains that you control or have already
      Message 2 of 4 , Aug 4, 2008
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        On 8/4/2008, fajar (fajarep@...) wrote:
        > The following message to <yyy@...> was undeliverable.
        >
        > The reason for the problem:
        >
        > 5.4.7 - Delivery expired (message too old) [Default] 451-'Sender verify
        > failed'

        Why are you using sender verification? You should NOT use SAV for all
        messages, only for messages destined to domains that you control or have
        already gotten permission to do SAV for, or you WILL evenutally get
        blacklisted.

        Please post postconf -n output...

        --

        Best regards,

        Charles
      • fajar
        ... Hello Charles, This response wasn t generated by our postfix server, but, by remote destination mail server, and I believe it is Exim mail server. Our
        Message 3 of 4 , Aug 4, 2008
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          > Why are you using sender verification? You should NOT use SAV for all
          > messages, only for messages destined to domains that you control or have
          > already gotten permission to do SAV for, or you WILL evenutally get
          > blacklisted.
          >
          > Please post postconf -n output...
          >
          > --
          >
          > Best regards,
          >
          > Charles
          >

          Hello Charles,

          This response wasn't generated by our postfix server, but, by remote
          destination mail server, and I believe it is Exim mail server. Our postfix
          mail server is working fine. It can send to other mail server without
          problem. Thanks.

          Fajar
        • Charles Marcus
          ... Sorry... I thought that was from your logs... Obviously, then, THEY are trying to perform sender verification on you AFTER they have already accepted your
          Message 4 of 4 , Aug 5, 2008
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            On 8/4/2008 9:10 PM, fajar wrote:
            >> Why are you using sender verification? You should NOT use SAV for all
            >> messages, only for messages destined to domains that you control or have
            >> already gotten permission to do SAV for, or you WILL evenutally get
            >> blacklisted.
            >>
            >> Please post postconf -n output...

            > This response wasn't generated by our postfix server, but, by remote
            > destination mail server, and I believe it is Exim mail server. Our postfix
            > mail server is working fine. It can send to other mail server without
            > problem. Thanks.

            Sorry... I thought that was from your logs...

            Obviously, then, THEY are trying to perform sender verification on you
            AFTER they have already accepted your message for delivery - which means
            they are engaging in backscatter.

            Still no postconf -n output - how do you expect anyone to help?

            --

            Best regards,

            Charles
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