How to protect home mail server?

Use Gentoo as an operating system for the server

>>61919501
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>>61919591
I would just like to interject for one moment. The operating system you are suggesting for me to install, and rather commandingly might I add, will in fact, not directly solve my current problem at hand, and will actually cause me to ask further questions about the difficult process involved in installing it. Gentoo is a very nice operating system itself, but I'd rather you directly assist me in my quest to solve my current predicament.

I understand that many computer users run the Gentoo Linux operating system, and I realize they may enjoy it greatly and are not currently experiencing the current problem that I have whilst using my non-Gentoo operating system. Through a peculiar turn of events, I have noticed an enormous amount of users make the "Install Gentoo" suggestion, but many of its users are not aware that this suggestion, in most cases, is actually not an "easy-fix" to every single computer-related error.

There really are reasons for installing Gentoo, and there are people using it, but it is just for the few users who choose to compile their own source code locally according to their chosen configuration. Gentoo is just another operating system: the problems I am experiencing will not undeviatingly be solved if I make the choice to install it. All these so-called "Install Gentoo" suggestions I am noticing should cease immediately.

Block any ips outside of your home country.

>>61919650
Gentoo offers great security memes such as SELinux and grsec. Gentoo Hardened is a special sub-project of standard Gentoo that is designed for high security environments and is among the best in that regard. Also, I've heard that every Gentoo install having custom CFLAGS is also a plus for security.