Nobody likes rules, but we do have a few you should be aware of.
Our Terms & Conditions of Service are the core rules that govern our members' relationship with us and are the final word on most "can and can't" issues.
With respect to our email forwarding service, we impose fairly strict acceptance requirements on inbound email to fight spam. Our documentation of this, called Stop Helping Spammers!, provides information many people find helpful when troubleshooting email server configuration issues that cause their messages to get treated as spam.
We accept checks and money orders via US mail, and we have information about that.