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Server with turned off sender verify or ON?

Discussion in 'E-mail Discussion' started by toplisek, Sep 22, 2011.

  1. toplisek

    toplisek Well-Known Member

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    I need help what are benefits and disadvantages to set server with turned off sender verify or ON.
    Need help.
     
  2. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    sender verification will check that the domain does exist prior to accepting the message. This is typically used as an anti-spam message to cut down on spoofed messages for non-existing sender domains.

    Please note there is a difference between using sender verification and sender verification callouts. Callouts actually connect to the remote machine to check an address actually exists. Oftentimes, callouts will cause legitimate emails to be bounced due to policies on the sending machine for such a connection. As such, I would not recommend enabling sender verification callouts, but I would recommend enabling sender verification.
     
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  3. toplisek

    toplisek Well-Known Member

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    Issue is that I have SENDER VERIFICATION ON and sender verification will check that the domain does exist prior to accepting the message. Domain exists and it is valid. How to solve this as domain is valid but still refused by server. What is exact definition of sender verification...
     
  4. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    1) What is the exact error message that is occurring?
    2) What is the domain name that isn't working to send to your machine?
     
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  5. toplisek

    toplisek Well-Known Member

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    #550-Verification failed for <myname@fictualdomains.com> 550-No Such User Here 550 Sender verify failed
     
  6. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    This indicates the user doesn't exist with that domain on the machine in question. Also, that isn't the correct domain, right? I'm asking as fictualdomains.com doesn't route.
     
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  7. toplisek

    toplisek Well-Known Member

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    I'm sorry but under security I can not send domain name. In your opinion this is issue on the sender side server (Microsoft Exchange Server)? Which setting defines this as I thought it was issue with setting on receiver side: SENDER VERIFICATION ON
     
  8. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Does the user exist on that other server? If the user cannot be verified as existing, then the check is going to fail. You could add the IP for that machine to WHM > Exim Configuration Editor > Sender verification bypass IPs area.
     
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