Hey all, I have a VPS with Hostinger that serves a few websites, very basic stuff, simple blogs or static pages, very low traffic.

At the moment I have 'custom domain' emails set up with Protonmail and also Tutanota. They are mainly for client communication one-to-one, I very rarely if ever do mass mail-outs.

I'm looking into the possibility of setting up a mail server instead, but it seems it's generally not a good idea to run mail server and web server on the same VPS. [-- if anybody thinks there may be exceptions to this, do let me know, because I would still be interested if it's not an entirely bad idea?]

So I'm wondering about a dedicated VPS to run my mail server, but really don't want to pay much.

In order for it to be cost effective (as opposed to just paying for a mail service with multiple custom domains), i'd want a VPS with 3GB ram and 20-30GB storage that doesn't block port 25, for less than $6 per month.

Is this likely? Anyone know of any contenders?