This is a common belief but it hasn't been an issue in my experience of running my email server (with Sovereign) for the last two years. I run about a dozen email addresses over a handful of domains for myself and some friends and colleagues.
Sovereign includes instructions/configuration to run an upstanding email server citizen, including SPL, TKIP, MTA encryption, etc. Remote mail servers seem to respect it at least as much as gmail.
It also runs a rbl-check script once a day to notify you if your IP ends up on a blacklist. In two years running on both DigitalOcean, I've had no issues. Even gmail routinely gets added to RBLs from time to time.
Sovereign includes instructions/configuration to run an upstanding email server citizen, including SPL, TKIP, MTA encryption, etc. Remote mail servers seem to respect it at least as much as gmail.
It also runs a rbl-check script once a day to notify you if your IP ends up on a blacklist. In two years running on both DigitalOcean, I've had no issues. Even gmail routinely gets added to RBLs from time to time.