Did they really e-mail you your password?

Reason for all being upper case is probably because their database where passwords are stored is case-insensitive, ie when they pull up your data, it's all in upper-case and when you log in the case doesn't seem to matter at all. Any case seems to be ok as long as you enter right characters.

E: RogerD408 actually told all this already but still, I think it's a breach of security to not store, and use, passwords with case-sensitivity.