Nobody uses that format to report problems. Spammers use it to sneak
stuff into your mailserver. You're not missing out on anything. Its
thorough and respectable for them to inform you of it, but in reality,
you're better off as you already are.
Actually, this is not true. Block lists like dsbl.org use this format
to send unblock confirmations to your postmaster. If you cannot accept
this mail format, you WILL NOT be removed from the list.
I sent a very grubby hack to Sam mid-last year fixing this, but it never
got into the disto :(