Is it okay to send a thank you card by email instead of mail?

For casual situations, a thank you email is perfectly acceptable. For meaningful occasions, a printed card leaves a stronger impression.

• Email is fine for informal thank-yous and quick acknowledgments.
• A mailed card is better for weddings, funerals, graduation gifts, and formal occasions.

A card printed on quality stock signals that you put real thought into the gesture, so the physical note feels as considered as the words inside it.