Bestway to make bulk emails for Serlib 2.0?

What is the best way to get bulk emails for Serlib 2.0?

What I am doing right now is
Using a catch all

Making fixed emails on the catch all but I think the software cannot tell the difference between emails intended for deferent emails. 

so
john.doe@catchall.com
john.doe1@catchall.com
john.doe2@catchall.com
So on but to check emails it logs into john.doe@catchall.com