I recently found out that the company I use for shared hosting stores passwords for email accounts in plaintext (they mentioned this to me incidentally, while troubleshooting another issue). They're a major company that does business and e-commerce hosting, so I'm shocked. But I'm just a hobbyist, so I'm not completely sure there aren't exceptions to the rule that you should never store plaintext passwords.
Is there any possible justification for this? Are email account passwords somehow different, such that I shouldn't be concerned that they were able to look it up?
update - in case anyone was curious, I inquired further and found out that the passwords weren't in plaintext, but they were reversibly encrypted. Still not ideal but considerably less bad.