Block PHP mail

Discussion in 'Tips/Tricks/Mods' started by Marcio Urakawa, Dec 17, 2020.

  1. I would like to know if there is a way to block the email sent through the hosted sites?

    There are several sites that are using the Ispconfig postfix to send spam.
    I would like only my email used in Ispconfig to send login to be used.
  2. Jesse Norell

    Jesse Norell Well-Known Member Staff Member Howtoforge Staff

  3. nhybgtvfr

    nhybgtvfr Well-Known Member HowtoForge Supporter

    as an extra possible step, assuming you have a multi-server setup, since a compromised site might have it's one smtp sender installed, you could add an iptables rule to block any outbound connections with a destination of port 25, and force anything that wants to send mail from that server to use an authenticated email account.

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