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!

SMTP Tweak - Advantages & Disadvantages?

Discussion in 'E-mail Discussion' started by ES - George, Oct 11, 2011.

  1. ES - George

    ES - George Well-Known Member
    PartnerNOC

    Joined:
    Jun 12, 2011
    Messages:
    141
    Likes Received:
    2
    Trophy Points:
    68
    Location:
    UK
    cPanel Access Level:
    Root Administrator
    I decided to spend a few hours going through every single option in WHM and seeing if anything needs changing, asking any questions I may have, etc to help benefit my server's performance and stability.

    SMTP Tweak - I've seen the option before, however never really looked into using it. Would you say it's good practice to have it enabled? From what I can gather, the advantage is that it stops people from abusing the mail server. I was just wondering if it has any benefits, i.e. effects on the server load, issues with mailing, etc.

    Thanks very much.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  2. ES - George

    ES - George Well-Known Member
    PartnerNOC

    Joined:
    Jun 12, 2011
    Messages:
    141
    Likes Received:
    2
    Trophy Points:
    68
    Location:
    UK
    cPanel Access Level:
    Root Administrator
    Anyone, anyone at all?
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. NixTree

    NixTree Well-Known Member

    Joined:
    Aug 19, 2010
    Messages:
    405
    Likes Received:
    3
    Trophy Points:
    143
    Location:
    Gods Own Country
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    Yes, it is a good practice to enable this feature. If you enable it, only restricted users can open a direct SMTP socket to a remote host which will enforce the normal users to use exim/sendmail to send emails; which will prevent the vulnerable scripts from abusing your server which will try to send emails in a similar fashion.

    To know how its working, just enable this feature and allow shell access for a cPanel user.Now run telnet <any remote SMTP server > 25 and you can see that it won't reach the destination server and remains "connecting..." state....

    If you have CSF installed on your server, pleaes disable this featre in WHM and enable it in your CSF conf instead.

    Thank you,
    Nibin.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
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