Why wouldn't it be? Any email you send should be from a valid address that you control (not from a domain you don't own or have any control over,
Chipotle). If you only have one email address, and are either unable or disinclined to create another that would be dedicated to your FreeNAS server, then your own email address would seem to be the most appropriate answer.
Ah! Excellent, another well-read person, re: Chipotle. Yeah, just making up something that you don't actually have the right to use is infinitely annoying. First, many mailservers will not accept mail that involves an envelope sender or recipient with an invalid domain; DNS is easily checked these days for legitimacy. If the domain doesn't exist, there's certainly a risk that someone might "fix" that on you (hey, Chipotle!). But equally bad is that someone might actually legitimately have that address. So for giggles I have "jgreco@yahoo" - not that I actually use their mail service for anything, just that I like having it. There are about a dozen effwits who also think they have that address, and I occasionally get notices from "my" car dealership, some idiot doctors service, bank statements, legal documents, etc. and I could probably really tear in and do some real damage if I was malicious.
Use an address that's yours and that you control. There's no harm in using your own e-mail address, or setting up a secondary e-mail address with a freemail provider. Get a static IP address and a domain name and then you can even provide your own e-mail service.
