All e-mail content is interpreted as UTF-8, leading to a UnicodeDecodeError for some e-mails in a different encoding.

[geraldschmittinger]

I encountered an issue with Open Trashmail:

When I send an e-mail in ISO-8859-1 encoding containing an ä, this causes the e-mail to be rejected due to a UniformDecodeError.

I figured that the reason for this is that in python/mailserver3.py (line 52), the content of the e-mail is always parsed as UTF-8. However, in ISO-8859-1, an ä has the code 0xE4, which is a continuation byte in UTF-8. When the character preceding this byte cannot validly be continued, the text is not valid unicode and therefore causes this error.

[RyanZufaellig]

Hello,
There is already a commit waiting to be accepted: 9aeae95
I made the changes myself, and it worked flawlessly.