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Direct mail glossary.

Plain definitions of direct mail and address-verification terms: CASS, DPV, RDI, NCOA, ZIP+4, First-Class and more.

#10 envelope

The standard US business envelope, 4⅛ by 9½ inches, which holds a letter-size sheet folded in thirds. Mailyard letters mail in a windowed #10.

ABM

Account-based marketing

Reaching the buyers at a defined list of target accounts with coordinated, personal outreach. A letter to each buyer's office is a common ABM touch.

See also: Target accounts (ABM)

Address block

Address window

The area of page one that shows through the envelope window, holding the recipient's name and address. Mailyard's letter canvas keeps it clear automatically.

Address standardization

Rewriting an address in USPS's preferred form: standard abbreviations such as ST and STE, corrected spellings and the full ZIP+4. CASS-certified software does it.

Always-on campaign

A Mailyard campaign you approve once that mails leads as they arrive from the API or a Clay column, funded from a prepaid balance.

See also: Clay

CASS

Coding Accuracy Support System

USPS certification for address-matching software that checks and standardizes addresses and adds ZIP+4. Mailyard checks every address with CASS before it can mail.

See also: USPS CASS verification, explained

Closed-lost

The CRM stage for opportunities that ended without a deal. These lists make a natural mail audience because you already know the people and the problem.

See also: Reopen closed-lost

CMRA

Commercial Mail Receiving Agency, private mailbox

A business, such as a mailbox store, that receives mail for customers under a private mailbox (PMB) number. Mailyard's verification reports whether an address is a private mailbox.

Contact ID

Your system's ID for a person, such as a HubSpot record ID. Mailyard passes it on with each QR scan as mailyard_contact.

See also: HubSpot and CRMs

Delivery point

A single place USPS delivers mail, such as one house, one office suite or one PO box.

Double-window envelope

An envelope with windows for both the return address and the recipient's address, printed on the letter itself, so the address always matches the letter inside.

DPV

Delivery Point Validation

A USPS check that an address is a known delivery point, beyond a number in a valid street range. An address can look right and still fail DPV.

DPV codes

The one-letter result of a DPV check:

  • Y: confirmed, including any suite given.
  • S: building confirmed, suite given couldn't be confirmed.
  • D: building confirmed, but a needed suite is missing.
  • N: not a confirmed delivery point.

Enrichment

Adding outside information to a contact, such as company, title or city. Mailyard uses it to find a contact's current employer and location before researching an office.

First-Class Mail

USPS's main letter service, faster than USPS Marketing Mail, with forwarding and return to sender included. Every Mailyard letter mails First-Class.

Held address

In Mailyard, an address that won't mail until someone acts, shown with its reason. Held results use no credit.

Landing page

The web page a QR code or printed link opens. One made for the letter's offer makes response easy to measure.

Lead list

A list of people you want to reach. In Mailyard, lists in Leads are researched once and reused in any campaign without new credits.

Mail drop

A batch of letters mailing on one date. Mailyard schedules drops 24+ hours ahead, and they can be withdrawn or moved until they print.

Merge field

A placeholder, such as first name or company, filled with each recipient's value at print. Mailyard holds anyone missing a printed field, so "Dear ," never mails.

NCOA

National Change of Address

USPS's database of filed change-of-address requests, licensed to mailers as NCOALink. It won't tell you a contact changed jobs.

Personalization

Tailoring each letter to its reader through merge fields and copy written for that group.

A render from the actual print pipeline for a real recipient. In Mailyard you approve three to five, chosen to cover edge cases like the longest name.

Proof

Any preview made for review before production. A browser preview helps while you edit; a print proof is what you approve.

RDI

Residential Delivery Indicator

USPS data marking an address residential or commercial. Mailyard can mail a published business address RDI marks residential, but never looks up a person's home.

Return address

The sender's address on the piece, where USPS sends undeliverable mail. Mailyard checks yours with USPS before a drop.

The short URL behind a QR code, such as go.mailyard.ai/ABCDEFGHJK. It records the scan, then opens your landing page, which can change after printing.

Secondary address

Suite, floor, unit

The suite, floor or unit, which decides which business in a building gets the letter. Mailyard holds a missing or unconfirmed suite, and suite repair can recover one.

Suppression list

People and companies who must never be mailed. In Mailyard, matching emails, domains, LinkedIn profiles or companies are left out of every drop.

Tri-fold

Folding a letter-size sheet in thirds to fit a #10 envelope, with the address block landing in the window.

USPS Marketing Mail

Formerly Standard Mail

A slower, lower-cost USPS class for advertising mail with a minimum piece count. Undeliverable pieces generally aren't forwarded or returned.

Vacancy flag

A USPS indicator that an address has been unoccupied for an extended period. Mailyard holds vacant addresses.

Webhook

An HTTP request one system sends another when something happens. Mailyard sends signed webhooks for scans, address results and enrollments.

ZIP+4

The nine-digit ZIP Code, whose last four digits narrow delivery to a block side, building, floor or suite. CASS software adds it.

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