> If you mean an email (or the part before the @), also no. People sometimes sign up from addresses like contact@example.com, and "dear contact" would be super confusing.

I was going for the principle that we're not trying to mimic human emotions when it's a mail to remind you to accept the latest TOS.

So, no "Dear", no trying to come up with something socially acceptable, just plain "miki123211@hn.xx, please review our newest Terms and Services at https://....../...."

The "what should we call you" field sounds attractive, but would be ripe for abuse IMHO. Not on technical terms, but users would definitely play with it to have you send "Mrs DeepshitFuckHorse please confirm your email at...." to random addresses for instance, or any other vector that we're not thinking about right now.