It was just an example. Maybe you have your private key locally to access your email, so that if there is a security breach it's impossible for them to release unencrypted emails?
I mean I don't know why, but there are loads of good examples of why someone would.
Just about nobody uses that. Your bank, your online store, your doctor, the state, and about everybody except Alice and Bob send you unencrypted mail.
Encrypting your email once received is like storing your postcards in a safe.
It was just an example. Maybe you have your private key locally to access your email, so that if there is a security breach it's impossible for them to release unencrypted emails?
I mean I don't know why, but there are loads of good examples of why someone would.