Deny all access to SMTP/POP3 and enable only for specific IP

Jangan

• July 15, 2018 06:48

Hello everyone, I want to Deny all access to SMTP/POP3 and enable only for specific IP address. so everyone will not be able to connect MYSERVERIP@ port 25 or 465 or 110 or 993 but i will enable 1 IP to connect to them so allow ip EXTERNALIP to connect to MYSERVERIP

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  Jcats

  • July 16, 2018 04:39

  You can use iptables but to make it easier to manage, install CSF:

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  cPanelLauren

  • July 16, 2018 18:34

  You could also use Host Access Control to do this as well - you can control SMTP, POP3 and IMAP access using this feature. More information can be found in our documentation here: Host Access Control - Version 72 Documentation - cPanel Documentation Thanks!

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  keat63

  • July 17, 2018 08:22

  I've tried this., and I'm pretty sure that you can't block port 25. By doing so you'll also block other email servers from connecting, resulting in you receiveing no emails at all. Unfortunately, anyone can still then connect to smtp using port 25. For starters, I would suggest to toy with HostAccessControl. In HAC, add POP3 .................... Your IP .......................... Allow IMAP ..................... Your IP .......................... Allow then POP3 .................... All .......................... Deny IMAP ..................... All .......................... Deny Could you use the same rule for SMTP or would this cause problems with other email servers ???

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