Got a bounce back when sending an email to client. They have SBS 2008 with exchange 2007 installed. They are poping the email and sending directly out of the server without smarthost.
The bounceback it generated by their local exchange as below:
Diagnostic information for administrators:
Generating server: xxx.local
antispam3.c0.bise6.blackberry #<antispam3.c0.bise6.blackberry #5.0.0 smtp;550 #5.7.1 Your access to submit messages to this e-mail system has been rejected.> #SMTP#
I don't understand why there is somethign to do with blackberry here.... "antispam3.c0.bise6.blackberry"