Only smarthost can connect on port 25

RouterOS Beginner Basics
1

Hello,

I was wondering if somebody had something similair. We have a mailserver behind an mikrotik, and we want to use an external spamfilter/smarthost. And that the mikrotik only accepts traffic on port 25 from that external specific hosts. The port25 is natted to the inside.

I have read alot but cannot find it. Can somebody help me out with a code snippet?

Regards michel :laughing:

2

In the destination NAT rule you can use either the Src. Address or Src. Address List to restrict the NAT rule to traffic from either a single address or list of addresses respectively.

3

Thank you for your directions it is working..

regards Michel :smiley: