Opener should skip old contacts

Answer:

There are two possibilities,

1. You limit the "Check number of contacts if an opener may be sent".
2. 1. You count all new contacts that should be written to (if there are many, do a network export first and then count the rows of the table).
   2. You enter this number into the field "Check number of contacts, if an opener may be sent" in the opener function.
3. You use the CompLeadly blocklist