As the title suggests, I'm trying to build a High Recoverability(HR for now on) Mail Server. I've searched the Internet for days now and I haven't found an actual "tutorial" style article that recommends packets or techniques to make the HR server itself.
My best sources so far are this answer and this second answer, but links on the first answer are broken and there isn't much to go on, frankly.
Could anyone provide me with some pointers as to how I can build a HR Mail Server?
