LetterAgent

Mail physical letters by just asking your AI assistant.


Status: LetterAgent is currently in private testing ahead of public launch. Everything on this page describes the service as it works today.

Home > Guides > First-Class vs Standard mail

What is the difference between First-Class and Standard (marketing) mail?

First-Class mail moves faster, gets forwarded when the recipient moves, and returns to you for free if undeliverable. Standard mail (now called USPS Marketing Mail) is cheaper per piece but requires bulk minimums, moves slower, and is not forwarded: if the address is wrong, it is typically recycled, not returned.

First-Class MailUSPS Marketing Mail (Standard)
SpeedThe fastest regular mail class; moves through the network ahead of marketing mailDeliberately slower; the post office processes it when capacity allows
If the recipient movedForwarded to the new address at no charge during the forwarding periodNot forwarded; discarded (or returned only if you paid for an address-correction endorsement)
If undeliverableReturned to sender free of chargeRecycled, unless you added and paid for return or address-correction service
MinimumsNo minimum: a single stamped envelope qualifiesBulk minimums (generally 200 pieces or 50 pounds) plus a postage permit
Best forPersonal letters, bills, statements, anything addressed to a specific personFlyers, catalogs, promotions sent to large lists

Why does forwarding differ between the two classes?

The post office treats First-Class mail as addressed to a person: when you file a change of address, it follows you. Marketing mail is treated as addressed to an occupant, more or less, so the post office doesn't spend the effort rerouting it. This is the single biggest practical difference for anyone mailing something important. A First-Class letter to an old address still reaches the recipient; a marketing-mail piece to an old address never leaves the building. The former tenant's trash is where it goes.

What does "address service" mean, and when would you buy it?

Marketing mailers who care about their address lists can pay for an endorsement printed under the return address, the most common being "Address Service Requested." That endorsement turns the normal discard behavior into a return: the undeliverable piece comes back with the recipient's new address on a correction notice, and the mailer is billed a fee for it. First-Class mailers don't need this trick: forwarding and returns are baked into the class. If you ever see a marketing mailer paying extra per piece, it's usually this endorsement, not fancier postage.

Can individuals use Standard mail at all?

Practically, no. The bulk minimums and the permit requirement put Standard mail out of reach for personal letters. A single letter, even a chunky one, goes First-Class or one of the package services. Standard mail only pays off when you're sending hundreds of identical pieces and the per-piece discount outweighs the permit and presorting work. One exception people sometimes hear about: local "every door direct" promotions still ride through retail channels, but that's a business program, not something you use for a birthday card.

Which class does LetterAgent use?

LetterAgent mails letters with first-class postage or the fastest available non-express service, so your letters get the First-Class treatment: forwarding when the recipient moves and free return if undeliverable. Marketing-mail economics never enter the picture for a per-letter service like this. Pricing is quoted up front and you approve the exact price before anything is sent.

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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.

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