[Dovecot] Missing MIME-Version header in e-mails.

Hi,

I notice that in src/lib-mail/message-parser.c, there is a section of code that checks for the presence of MIME-Version before allowing processing of the Content-* headers.

Is there a possibility of relaxing this rule? There are some broken mailers, in particular newsletter mailers that do not seem to honour the MIME-Version header, though they do send the Content-Type.

Cheers.