IMAP Content-Type differs POP3 and IMAP

[cshjsc]

When receiving Emails through POP3 the conten-type is not modifed, for example 'text/plain'.
But when receiving with IMAP it gets modified(uppercased) and its 'TEXT/PLAIN', is there
a special reason why this is done.
This is a problem because while testing signed emails, if the contents of the email get modified the hash doesn't match anymore and my test fail.

I checked the source code and found the problem is caused probably by SimpleMessageAttributes:parseBodyStructure(bool)

[marcelmay]

Media type is defined as case-insensitive.

I will change it to return as provided, and hope it will not cause too many troubles as this might break tests.

[marcelmay]

Thx for reporting, @cshjsc !

[cshjsc]

Thanks for the quick solution!