Here’s a tip for internet domain owners:
Make sure the contact information for your domain has more than one email address. And make sure at least one of those email addresses is not in the domain itself.
If your email starts malfunctioning, you want people to be able to tell you about the problem … and if the only email addresses you list are in the actual domain, they won’t be able to contact you.
The contact information is publicly accessible via the ‘whois’ databases.
Domain registrars that offer whois privacy capabilities should let you list more than one email address when they redirect the email address that they list in the whois lookups.
For privacy sake, I like using a PO Box for the mailing address on all my domains.