There is a long way to solve this problem and there is a short way to solve this problem.
short way first:- Mikrotik supports user authentication on out bound mail, so all you need to do is create a valid email user account on our mail server and use those credentials in your MT router Email settings so that you don't need an 'open mail relay'. Long way:- There is a setting call set-pref-src= in the routing filters, which accomplishes what you are asking for, however you will have to figure out on how exactly to tailor it to work for your environment. (I had to find this setting for one of our Peering Routers, a bit of a long story). :) Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > From: "That One Guy /sarcasm" <thatoneguyst...@gmail.com> > To: af@afmug.com > Sent: Tuesday, August 9, 2016 12:51:03 PM > Subject: [AFMUG] mikrotik present as loopback address > right or wrong, i want to set up an open mail relay on our network for > mikrotik > backups. I want to lock the relay down to only accept traffic from our > internal > subnet for loopback IPs on the site routers. How do I make specific traffic > always present as the same IP no matter which interface it exits since i cant > seem to find a way to masquerade the output chain > if it is doable, is there also a way to add a line to our default configs that > will set the presentation IP to whatever the loopback IP on that device is? > -- > If you only see yourself as part of the team but you don't see your team as > part > of yourself you have already failed as part of the team.
