[Mailman-Users] sync_members script

[Zbigniew Szalbot]

Hello, 
Just wanted to ask how you manage the following situation: 

There is a list of people you keep in an sql database. This database is
edited/updated daily. From time to time you want to contact these people,
so you export them as a flat file and import into Mailman (for example by
using sync_members script). 

You do the mailing and some addresses are removed from Mailman. When you
next time sync members from you sql database with Mailman, the sync_members
script will add the previously removed members again, won't it (as they
will not exist in mailman but will be in a flat file exported from sql
database)? 

How do you handle this situation? When you get information about
Mailman-unsubscribed emails, do you remove them then from your sql
database? Is there any other way round it? 

Thanks! 

Zbigniew Szalbot