Need to add single host to smtpd_client_event_limit_exceptions

[BCamp]

Hello, all. I've got a small problem with some incoming mail. Our administrators use a program that generates email and sends copies to everyone on a list. The problem is that it's been triggering the connection and message rate/count limit. I don't want to change those settings to accommodate one client if I don't have to. It looks like smtpd_client_event_limit_exceptions would be the proper fix here, but I don't know the proper "Zimbra" way to adjust the setting without breaking what's there by default. Here's the default setting:

:~$ postconf |grep smtpd_client_event_limit_exceptions
smtpd_client_event_limit_exceptions = ${smtpd_client_connection_limit_exceptions:$mynetworks}

I want to add the machine by IP address. Is it as easy as

postconf -e smtpd_client_event_limit_exceptions = ${smtpd_client_connection_limit_exceptions:$mynetworks} xxx.xxx.xxx.xxx

Or .....?

[BCamp]

Shameless bump. Surely someone knows the answer to this? Thanks in advance.