in case you’re not already aware; mail servers are favorite target of malware & intrusion enthusiasts so be sure to approach your build with security at the forefront of all your actions.
i found out; well after the fact; that my build got pwned at step 2 after spending money and weeks worth of time to do the same thing you’re trying to do and i wish someone had clued me into this little bit of common knowledge back then; good luck.
it’s like using google from 2000’s; thanks for sharing