Group mail address - HELP!

Hi,

When we send mail externally and cc: it to an internal group address, we are having problems. The following is part of the headers from a message I sent from my work address to my personal address:

To: damianconnolly@gmail.com

Cc: IT2@ourdomain.ourdomain.com

Subject: testetsetestestestestest

However, the actual “from” address is Damian.Connolly@ourdomain.com.

Is there any reason that the domain is being “doubled” when it is CCed and is there a fix for this?

We have already tried a number of things such as:

Recreating the group

Renaming the group

Changing the purpose of the group (I’ve tried “Multi-Purpose” and “Mail only”)

Any help would be much appreciated!

Cheers