Getting a clean IP and keeping it clean is a hassle. Some networks (eg. AT&T) use some sketchy blacklists that blacklists entire B-blocks and you have to get th

Getting a clean IP and keeping it clean is a hassle. Some networks (eg. AT&T) use some sketchy blacklists that blacklists entire B-blocks and you have to get them to whitelist your IP. The problem is that after you finally get your IP in a nice state, then you are stuck with that IP. And with many of the cheaper VPS providers, that means you are stuck with that instance because the IPs are paired with the instances. But some VPS providers allow you to have a reserved IP that you can use as your SMTP IP, keeping it independent of your server instance. I'm about to switch to vultr.com for this feature, which means cleaning another IP but hopefully the last one for a long time.