Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Email authentication not working with local sender

Discussion in 'E-mail Discussion' started by speckados, Oct 16, 2018.

  1. speckados

    speckados Well-Known Member

    Joined:
    May 21, 2003
    Messages:
    330
    Likes Received:
    2
    Trophy Points:
    168
    Location:
    Pastrana :: Guadalajara :: España
    cPanel Access Level:
    DataCenter Provider
    Twitter:
    Hi..

    Simple not work when:
    • user send is local address
    • user receiver is local address
    Cpanel CloudLinux 6.0 v 74.0.9
    CSF SMTP_LOCAL = 1
    WHM FKA SMTP Tweak off (try inverse)

    Proff concpet
    Code:
    telnet cp430.myserver.com 25
    Trying 178.33.111.168...
    Connected to cp430.myserver.com.
    Escape character is '^]'.
    ehlo cp430.myserver.com
    
    220-cp430.myserver.com ESMTP Exim 4.91 #1 Tue, 16 Oct 2018 17:04:31 +0200
    220-We do not authorize the use of this system to transport unsolicited,
    220 and/or bulk e-mail.
    250-cp430.myserver.com Hello 230.red-2-137-130.dynamicip.rima-tde.net [2.137.110.123]
    250-SIZE 52428800
    250-8BITMIME
    250-PIPELINING
    250-AUTH PLAIN LOGIN
    250-STARTTLS
    250 HELP
    500 unrecognized command
    mail from: socios@localdomain.com
    250 OK
    rcpt to: info@localdomain.com
    250 Accepted
    data
    354 Enter message, ending with "." on a line by itself
    Prueba test
    .
    250 OK id=1gCQuo-003QX8-7W
    421 cp430.myserver.com: SMTP command timeout - closing connection
    Connection closed by foreign host.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    47,300
    Likes Received:
    2,155
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello @speckados,

    Can you post the output from /var/log/exim_mainlog when you reproduce the 421 error code using telnet?

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. speckados

    speckados Well-Known Member

    Joined:
    May 21, 2003
    Messages:
    330
    Likes Received:
    2
    Trophy Points:
    168
    Location:
    Pastrana :: Guadalajara :: España
    cPanel Access Level:
    DataCenter Provider
    Twitter:
    Hi. I put a ticket and tech, explain me why is possible.

    After this put ASSP de Luxe, for better security.

    Best regards.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    cPanelMichael likes this.
Loading...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice