The honest tradeoff
Email and direct mail each have a real strength and a real weakness. Email is nearly free to send and arrives instantly, but inboxes are crowded and a lot of marketing email is never opened. Mail costs more per piece and takes days to arrive, but it's physical, it lands on the counter, and it's much harder to ignore.
Neither replaces the other. The smart question isn't "which is better" — it's "which job am I trying to do."
Where email wins
Email is the right tool when speed and frequency matter and cost must stay near zero: appointment confirmations, quick announcements, newsletters, time-sensitive offers to people who already engage with your emails. When your audience reliably opens your messages, email is hard to beat on cost-efficiency.
Where mail wins
Mail earns its higher cost in moments that need to break through. Reactivating a patient who has ignored your emails for a year. Reaching someone whose email you don't have. Making a premium offer feel like an invitation rather than spam. A postcard on the kitchen counter gets a kind of attention an unopened email never will.
Mail is also harder to tune out: there's no spam folder for the mailbox, and a well-designed card gets at least a glance.
Use both, and measure both
The strongest local programs don't choose — they layer. Email handles the fast, frequent, low-cost touches; mail handles the high-stakes ones and reaches the people email can't.
The historical gap was measurement: email was trackable and mail wasn't. Trackable postcards close that gap. With a QR code on every card resolving to a per-recipient link, you can attribute mail scans much as you attribute email clicks — bearing in mind that mail also draws phone calls a QR never sees, so the comparison flatters email slightly. CardCadence makes that tracking standard on every card.