LetterAgent
Mail physical letters by just asking your AI assistant.
Every Door Direct Mail is a USPS program that delivers one mailpiece to every address on the carrier routes you pick. No mailing list, no individual addresses, and no postage permit needed at retail: pieces go out addressed to "Postal Customer" and get dropped bundled at the post offices. LetterAgent can't run EDDM campaigns; it mails individual addressed letters only.
| Format | The rule, as USPS publishes it |
|---|---|
| Standard EDDM piece | A flat: larger than 6-1/8 inches by 11-1/2 inches |
| Maximum size | 12 inches by 15 inches |
| Weight | Capped at a few ounces per piece |
| Letter-size option | Only on rural or highway contract delivery routes (pieces as small as 3-1/2 by 5 inches qualify there) |
EDDM lives in flat-sized territory. Your piece must be bigger than a standard letter: taller than 6-1/8 inches or longer than 11-1/2 inches. The most common sizes printers run are around 6 by 11 inches, 8.5 by 11 inches, and 11 by 14 inches. The ceiling is 12 by 15 inches, and each piece has a weight cap of a few ounces. Here is the detail most people miss: on rural and highway contract routes only, you may send letter-sized pieces, down to 3-1/2 by 5 inches. That carve-out exists because those routes are long and cheap to add a smaller piece to, but it does not apply on city routes.
The whole process has four moves. First, you open the USPS EDDM online mapping tool, draw an area around your business or target neighborhood, and pick carrier routes; the tool shows you the delivery count per route before you commit. Second, you print the exact quantity for your chosen routes. Third, you bundle the pieces by carrier route with a facing slip on each bundle, exactly the way USPS specifies. Fourth, you drop the bundles at the post office that serves those routes, not just any post office. A print run that skips the facing slips or lands at the wrong post office gets rejected at the counter, so the paperwork is not optional.
Plenty. It targets geography, not people: every door on the route gets a piece, including households that will never buy from you, and you cannot exclude individual addresses. There is no name on the piece and no personalization; the generic "Postal Customer" line is the whole addressing strategy. EDDM travels as Standard Mail, the marketing class, which means slower and non-guaranteed delivery compared with First-Class. And because you never learn who received a piece, response tracking has to come from the piece itself: a dedicated phone number, a unique URL, a QR code, or a coupon code printed on the mailer. If your business depends on knowing exactly who got the mail, addressed direct mail with a real list is the better tool.
It fits businesses whose customers are defined by location: pizza shops, dentists, dry cleaners, realtors farming a neighborhood, home-services companies. The appeal is the missing overhead: no list to buy, no addresses to print, no permit to apply for at retail. The trade is waste: you pay to print and mail pieces to every door, including the ones that go straight to recycling. Run the math on what one new customer is worth to you before you print. For a one-off announcement to named people (invoices, legal notices, personal letters), EDDM is the wrong tool entirely, and a service like LetterAgent that mails individual addressed letters is the closer fit.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com