Can't connect via SSH by firstname.lastname@example.org but can via email@example.com
I have a droplet set up with a LEMP stack and domain name. I can connect to the default Nginx page using the domain in a web browser. Nmap successfully scans the server and correctly resolves the domain to the IP address. Ping does not. I am able to connect via SSH using the IP address, however if I try using ssh firstname.lastname@example.org, it hangs for at least five minutes (I have not left it on longer).
I suspect the issue may have to do with my local firewall, however I am unsure.