> If you set everything up right, You don't even need to set everything right. Up until very recently (months), I was sending emails from a few of my servers,

> If you set everything up right, You don't even need to set everything right. Up until very recently (months), I was sending emails from a few of my servers, and I had NOTHING set right. As in, I was sending from IP addresses that were never mentioned on my DNS, no PTR no SPF no DKIM no nothing. Just good old "here's an email from this address, trust me I actually own that address and it's legit". And it worked just fine. Surely just a reputation thing, as I had been doing this for over a decade, and all emails were very important (password recovery, order details, etc), no newsletter or anything. I recently replaced all that with zoho because I wanted something a bit more secure and didn't want to configure it myself.