We are trying to send a message to one of our employees who has a new
e-mail address through OE6. We keep getting the message

"Hi. This is the qmail-send program at pop7-1.us4.outblaze.com.
I'm afraid I wasn't able to deliver your message to the following
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

her new address:
Sorry, I couldn't find any host named comcast.net?. (#5.1.2)"

She is able to receive mail from other people fine, we are able to send
mail to other people fine, and if we bypass Outlook Express and send
e-mail to her via our webmail, it gets through to her fine (which leads
me to believe the problem is with Outlook Express). Any idea how we may
be able to resolve this issue?

Thanks.