we have in our GW8 system 1 GWIA. For almost all users, there's a limitation in mailsize (receive and send) at 8 or 20 MB

However, we're having more and more applications and Multifunctionals (MFP's) that are sending larger mails by SMTP.

I thought that creating a second GWIA (for mail within our GW-system without mailsize-limitation) could be a solution.
And keep the 1st GWIA for "regular" mail to the outside world.

However I don't quite see how to resolve any problems (routing, relaying)

Anyone thoughts on how to set this up?