Application Development Software

The project I'm working on to migrate users to the new 7.x messaging platform keeps asking me to do some special configurations.

I got this question today...

xxxxxxxxxxxxxxxxxxxxxxxxx
4. As inquired, when sent from SunMail to/copying multiple addresses, the outgoing email is replicated as many as the number of addressees
(For example, if you are sending an email to 10 people, the email is sent as 10 emails)

In the Exchange system, email to multiple recipients is replicated in the Top Mail Server. But in SunMail, such email is replicated to 10 emails when being sent.

We want SunMail emails to remain as a single email when being sent and only to be replicated to each recipient in the Top Mail Server.
This may be dependent on the specs of mail software, which means it may not be able to fix, but please confirm.
xxxxxxxxxxxxxxxxxxxxxxxxxxxx

The "top mail server" is just some postoffice product, appliance type mta for sendmail.

Is there anyways to pass along the email without expanding the recipients into individual mails?

Thanks.

-Ray