Due to the delay with the ComponentPro 7 release we've been using a beta build of the UltimateMail libraries and just discovered an issue with mail header parsing. Specifically, if a mail header (ex. subject) has RFC 2047 encoded text in it, the parser doesn't attempt to decode these values. It just passes the raw, encoded values along. This results in subject lines like "`=?Windows-1252?Q?RE:_This_is_a_test?=`" coming through when our code accesses the Subject property of the MailMessage object.
I'm unsure if this issue has already been reported, but if it has been and there's an updated beta build which addresses it we'd appreciate being able to get a copy of that build.