Free Reply Postage Update: What’s Changing on July 31
For the last few months, Navy Federal Credit Union has generously sponsored free Reply Postage on Sandboxx letters. That sponsorship is coming to an end on Friday, July 31. We want to give you plenty of notice, explain exactly what’s changing, and make it simple to keep free Reply Postage on the letters you send. […]
Sandboxx Community Newsletter
Issue 02 | December 2025
My Dad’s Letters
The letters I received at basic training had a powerful impact on the person I became.
Sending Letters to my Recruit at Boot Camp
A Marine recruit’s dad writes about his positive experiences with Sandboxx Letters.
How to Send Letters to Boot Camp
If you have a loved one at basic training, we have a mobile app that helps you send letters and pictures while saving you time.