Unlock mail

I'd be happy to help you with that! Can you please provide more context or information about what you mean by "unlock mail"? Are you referring to:

1. Unlocking a locked email account?
2. Accessing a locked or encrypted email attachment?
3. Resolving an issue with a stuck or undelivered email?
4. Something else entirely?

Please provide more details, and I'll do my best to assist you!