Neel, Not sure if this helps, but as we send a lot of email on behalf of one of our customers to their customers, and their customers have all variety of email addresses and formats, I did some checking on what we've sent to see if we have this issue as well, or if there was something I could provide to help you with.
We are on 6.3 as well, and on reviewing the Message entries, I found that everything was being sent properly, even when there appeared a "-". This may be a little different from how you are using the email system though- we are setting the "To" using a field on the record itself, not user (we don't have any users with a "-" in their email address, so I can't comment on this). What you may wish to do (since it seems to work when taking a dynamic email address as opposed to a user email address) is have a hidden field with a Set Fields action that sets the email address with the "-", then have your Email Filter/Escalation use the hidden field as the To, instead of the user's Login. HTH Shawn Stonequist EMNS Inc. _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org ARSlist:"Where the Answers Are"