Good idea... why do YOU not write a new professional email-client for a couple of dollars (or zero) for him? You will make him happy.
Because I'm not an Amiga hobbyist, duh.
And your answer is
a bounty?! Really?! If that ain't a wait for a train that don't come.
The reason it would be nigh on impossible to raise $10,000 for something like a solid up-to-date email client would be because y'all are happy with your YAMs and your SimpleMails. Y'all have become too content with the lack of quantity and quality of software available on the hobby platform.
apsturk points this out and all y'all can do is say, "try YAM" or "SimpleMail works fine for me", i.e. "Try something older and less functional", or "The problem must be with you". That my friends is what a content group sounds like.
You might have also tried:
"Just use webmail"
"No one uses a desktop for email anymore, get a smartphone"
"Reinstall everything and try again"
"Maybe the problem is with your IMAP provider"
And as far as sales of the yet to be released X5000 and X3500, I'm willing to bet the porting of a Linux email client that 75% of individuals that buy those are X1000 owners. Not that they'll actually release sales and market figures.