Sure. That's one of many reasons no seasoned Outlook user uses DL's.
Better ways of grouping recipients include separate Contact subfolders and
Categories:
http://www.slipstick.com/contacts/oloabcat.htm

Signature
Russ Valentine
[MVP-Outlook]
> If I send a distribution list of 20 email addresses and one of them is
> bad,
> the whole email is cancelled. Then I have to try each email address until
> I
> find the bad one. Can anyone help?