user getting undeliverable message for redirect?

[goosequeen]

I have clients when they send mail to me, they get the undeliverable email....You seee...I have the main pop email which works fine and then a mail group that goes to my blackberry.

So when they send to my main pop email, and the blackberry did not go through which happens a few times a week, they will get the error email saying it did mot go to the blackberry, which seems to them as if it did not go through to my pop and they contact me by phone etc causing a problem when in reality I did get it at the pop account.

this happens with the redirect too, is there a fix?
I would only like them to get the error if it did not reach my pop email, dont care about the blackberry.

Thanks
Goose