Why reverse DNS matters
Mail servers check that the IP sending an email has a PTR record, ideally one that points back to the same IP. Without it, your mail is far more likely to be rejected or marked as spam.
Shared servers
On shared hosting, many sites share one IP. That’s normal, but one compromised neighbour can hurt the IP’s email reputation for everyone.
Frequently asked questions
Reverse DNS is set by whoever owns the IP: your hosting or cloud provider, usually in their control panel.
A hostname that resolves back to the same IP, ideally your mail server’s name, like mail.example.com.
For business email volume, usually yes: your reputation is then yours alone.