Cheaper Postage for bulk mailings

[Devonte Blackmon]

Bigger pockets! Hey question. im still new to investing. Did a few direct mail campaigns. Now its time to follow up. Thing is though for my follow ups i am printing my own postcards much cheaper than using a service such as yellow letters. I was wondering how are you guys paying for postage on bulk mailings? It has to be a cheaper way than just buying rolls of stamps for hundreds of post cards.