Research shows that receiving handwritten messages strengthens social connection—one of the strongest protective factors for mental health.

Neuroscience research also finds that physical mail triggers a stronger emotional response and memory activation in the brain compared with digital messages — meaning tangible mail sticks emotionally and cognitively.

Studies on prosocial writing show that expressing encouragement and kindness boosts the writer’s own sense of joy and purpose.

About 80% of people keep cards that represent life or relationship milestones, like birthdays, celebrations, or heartfelt notes — showing that physical cards often become meaningful keepsakes