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disable Sender Verify Callouts for Authenticated SMTP users?

Discussion in 'E-mail Discussion' started by sneader, Feb 16, 2008.

  1. sneader

    sneader Well-Known Member

    Aug 21, 2003
    Likes Received:
    Trophy Points:
    La Crosse, WI
    cPanel Access Level:
    Root Administrator
    is there a way to bypass sender verify callouts for authenticated SMTP users?

    The example is here:

    I have a user on my server with the e-mail address of that uses my server for outbound SMTP.

    This user wants to have her FROM address in Outlook listed as something

    For some reason, the server is not working when we try to do
    sender verify callouts.

    This particular user has a dynamic IP address and so I cannot whitelist her IP to stop the
    sender verify callouts.

    So, to clarify, the user tries to send an e-mail to her account on my server, via SMTP-Authentication to my server, but is blocked due to sender verify callouts:

    SMTP: - SMTP Auth enabled
    POP3 Username:


    When she sends this message with SMTP-Auth via my server, the logs show:

    2008-02-16 17:02:00 (herpc) []
    sender verify defer for <>: response to
    "RCPT TO:<>" from [] was: 450 4.7.1
    <>: Recipient address rejected: Bad data on input

    2008-02-16 17:02:00 (herpc) []
    F=<> temporarily rejected RCPT
    <>: Could not complete sender verify

    The IP has already been added to the Sender Callout whitelist,
    but since it isn't the IP connecting to us, it isn't helping. The IP
    connecting to us is the end-user's dynamic ISP IP, currently, who uses us for SMTP mail.

    Again, this is an authenticated user trying to send a message. How can I stop
    the server from enforcing Sender Verify Callouts for authenticated SMTP users?
    Or for certain domains? Or other ideas?


    - Scott

    cPanel Ticket #237522
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  2. hillbilly1980

    hillbilly1980 Member

    Apr 25, 2005
    Likes Received:
    Trophy Points:
    I would add that we have a situation where a user has a POS program with a hardcoded from that sends them a report every night. The program is authenticating when connecting but the mail get rejected because of the call out, if the user authenticates the sender verify check should be bypassed, i only want to reject mail with incorrect from addresses if it's from an unknown third party. I can hardcode a bypass for an ip but not if the user is authenticated.

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