Re: Any RIM / blackberry folks around ?

* Mike Tancsa:

220 as08.bis.na.blackberry.com ESMTP HELO marble.sentex.ca 250 as08.bis.na.blackberry.com MAIL From: <postmaster@telus.com> 451 #4.1.8 Domain of sender address <postmaster@telus.com> does not resolve

This could just be an SPF failure. Try some sender address you control.