That's terrible operational security. You shouldn't be using the same email account in that scenario. Entering email credentials into an untrusted device will a

That's terrible operational security. You shouldn't be using the same email account in that scenario. Entering email credentials into an untrusted device will allow that device to send and receive emails, meaning it can read unencrypted emails. That's a major risk, considering that people might forget to encrypt them. Or they might simply follow other people's advice here and not use your advertised keys. Even granting untrusted devices access to encrypted emails pose a non-zero risk too because there are many ways it can go wrong.