LetterAgent
Mail physical letters by just asking your AI assistant.
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A letter travels from collection to a regional processing plant, then by truck or plane to the destination region, where the local delivery office sorts it into carrier walk order for final delivery to a mailbox, slot, or community box.
It starts at collection: a street collection box, a post office counter, or a mailbox picked up on a carrier route. Collection times matter more than most senders realize. A letter dropped in a box after the day's posted collection time sits until the next collection, so an evening drop can cost a full day before the letter even reaches a plant. Post office counters have later cutoffs than street boxes, and a letter handed over the counter is already one step ahead.
From collection, mail travels to the processing plant that serves the origin area. This is true even for local mail. A letter addressed to someone across town usually goes to the regional plant first, gets sorted, and comes back to the delivery office that serves the destination. The detour looks wasteful, but it is how the system keeps every piece on a machine line instead of hand-carrying local letters separately.
At the plant, the letter is faced, cancelled, read, and barcoded, then sorted into an outbound stream for its destination region. Plants run mostly overnight, which is why a letter mailed in the morning often shows its first real movement the next day. If the address cannot be read by machine, the piece waits for a person to key it in, and that wait can push it to a later outbound run.
Plants also split mail by shape. Standard flat letters run on high-speed lines. Anything thick, stiff, or irregular drops to slower handling. A wedding invitation with a wax seal or a chunky clasp is a good example: it may travel the same route, but it will not ride the fast line, and it may need extra postage because of its shape.
After the origin plant, the letter moves by truck for shorter distances and by air for longer ones. Long-distance mail in the US and Canada typically flies between major hubs, then trucks the last stretch to the destination plant. Weather, flight schedules, and highway conditions all bite here, which is why cross-country mail takes longer in winter and around holidays, when both planes and plants are full.
Cross-border mail adds a handoff. A letter from the US to Canada, or the reverse, passes from one postal operator to the other at the border, and tracking scans can gap during that transfer. The letter itself keeps moving; the visibility just pauses until the receiving operator scans it into its own network.
| Leg of the journey | Where it happens | What can delay it |
|---|---|---|
| Collection | Street box, counter, or route pickup | Missing the posted collection time |
| Origin plant | Regional processing plant | Unreadable address, odd shape |
| Long-distance transport | Truck or plane between regions | Weather, holiday volume |
| Destination plant | Plant serving the destination region | Misdirected bundle, plant backlog |
| Delivery office sort | Local delivery unit | Missing apartment or suite number |
| Final delivery | Carrier route to the address | Blocked box, unsafe access, moved recipient |
The destination plant sends the letter to the delivery office that owns the route. There it is sequenced into walk order, bundled with the rest of that route's mail, and loaded for the carrier. In many cities, carriers now receive mail already sequenced by machine, so the morning office work is mostly loading and checking, not hand-sorting each piece.
Delivery itself takes different forms. A house may have a curbside box or a door slot. An apartment building may have a bank of boxes in the lobby. Many newer Canadian neighbourhoods use community mailboxes, where residents collect from a shared bank a short walk away. The letter's journey ends at whichever of these the address points to, and a carrier will not improvise a different drop point just because a door looks more convenient.
Tracking sometimes shows a letter passing near its destination, then moving away again. That is usually the plant detour at work: the piece went to the regional plant for sorting before coming back to the local office. It can also mean the letter was sorted into the wrong bundle and caught at the next scan. Neither case means the letter is lost. A letter that keeps moving between plants, or that stalls with no scan for several days, is the one worth asking about.
When you mail through LetterAgent, the start of the journey looks different: you describe the letter to your AI assistant, approve the exact quoted price, and the letter is printed and mailed for you. It enters the postal network as a standard printed letter in a double-window envelope, and from there it follows the same collection, plant, transport, and delivery legs described above. LetterAgent letters go to US and Canadian addresses only.
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