vibe.inet.message: parseRFC5322Header() bug
Method parseRFC5322Header() breaks it's tees against gmail headers:
saying "Header is missing ':'."
After bit of debugging I've found that the reason for it is that google has no newline before email's body

RFC 5322, Section 2.1 explicitly mentions that the header and the body is separated by an empty line:
The body is simply a sequence of characters that follows the header section and is separated from the header section by an empty line (i.e., a line with nothing preceding the CRLF).
So if gmail really sends out something like that, it seems to be a rather serious bug on their part. You could, accidentally or on purpose, inject headers through the message body if there is no unambiguous separator between the two.