Please consider looking into an integration w/ stannp.com
They have an easy to use interface and a full API.
It costs 69 cents each to mail 1 or 1000 6×9 postcards 1st class mail in the USA – that’s a great deal. I use them w/ a Zapier integration to send thank you cards and I want to further integrate using it for 6 and 12 month reminders, and really for sending to neighbors!
