The Community Forums

Interact with an entire community of cPanel & WHM users!
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

disable Sender Verify Callouts for Authenticated SMTP users?

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

  1. sneader

    sneader Well-Known Member

    Joined:
    Aug 21, 2003
    Messages:
    1,126
    Likes Received:
    21
    Trophy Points:
    38
    Location:
    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
    user@domainhostedhere.com that uses my server for outbound SMTP.

    This user wants to have her FROM address in Outlook listed as something
    different, something@nothostedhere.com.

    For some reason, the nothostedhere.com 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:

    HER OUTLOOK CONFIG:
    SMTP: mail.domainhostedhere.com - SMTP Auth enabled
    POP3: mail.domainhostedhere.com
    POP3 Username: user@domainhostedhere.com

    FORMAT OF E-MAIL:
    TO: user@domainhostedhere.com
    FROM: something@nothostedhere.com

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

    2008-02-16 17:02:00 H=c-12-34-56-78.hsd1.ma.comcast.net (herpc) [12.34.56.78]
    sender verify defer for <something@nothostedhere.com>: response to
    "RCPT TO:<something@nothostedhere.com>" from
    mail.nothostedhere.com [98.76.54.32] was: 450 4.7.1
    <something@nothostedhere.com>: Recipient address rejected: Bad data on input

    2008-02-16 17:02:00 H=c-12-34-56-78.hsd1.ma.comcast.net (herpc) [12.34.56.78]
    F=<something@nothostedhere.com> temporarily rejected RCPT
    <user@domainhostedhere.com>: Could not complete sender verify
    callout

    The IP 98.76.54.32 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 12.34.56.78, 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?

    Thanks!

    - Scott

    cPanel Ticket #237522
     
  2. hillbilly1980

    hillbilly1980 Member

    Joined:
    Apr 25, 2005
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    1
    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.
     
Loading...

Share This Page