I'd like to add another voice to this: I host my own email myself out of my house, and I've never really had any problems with it either. AFAIK I've never been marked as spam, even after I've sent a couple of mis-configured emails that should have probably been marked as spam.

Have you ever done mailing list work? Like run a mailing list with a few tens of thousand users?

I host some people's notification emails, so it will send a few hundred a month. I highly recommend putting a single email recipient per email.

Nope. I can't say that I have. That definitely might be something that can get you flagged.

Your IP is leaked to everyone you email (and if you receive mail, to everyone who emails you), which is a privacy hole since it ties your IP directly to your identity. I assume you don't mind, or did you not realize this?

The whois shows my company name. I mean since I run a company, I don't really want that private. Also, those IPs are accessible through a simple DNS lookup of the sender domain, so I'm not really losing any security.

Oh, I thought you were recommending this for consumer usage. Yeah, if you have a company then there's probably nothing to keep private.

The hosting provider will probably put whatever you want in the whois.

The whois wasn't my concern though (since I already knew it was solvable); my concern was the IP address leakage, which gives away your location among other things...