What is a mailing list?
By Justin Winter · Updated August 22, 2026
A mailing list is a set of names and physical addresses you send the same piece of mail to — a spreadsheet of tenants, clients, donors, or customers, not a marketing platform or a piece of software. You can build one in any spreadsheet with a name and address per row, and send to the whole list by uploading it directly rather than typing each address in one at a time.
What actually goes in one
A mailing list is nothing more than rows of recipients: a name and a mailing address per row. Property managers keep one for tenants. Consultants and small firms keep one for clients. Nonprofits keep one for donors. HOA boards keep one for homeowners. None of these need a dedicated tool to exist — a spreadsheet with a name column and address columns already qualifies.
The old way: mail merge
If every recipient needs different wording — a different balance owed, a different name mid-paragraph — a traditional mail-merge document (a Word template plus a data source) is still the right tool, and it still requires printing, enveloping, and mailing everything yourself afterward.
The simpler case: same letter, many addresses
Most real mailing-list use is actually simpler than that: the same letter goes to everyone on the list, and only the address changes. A rent increase notice. An annual disclosure. A board's meeting notice. A thank-you letter to last year's donors. For exactly this case, you can upload the list directly — one shared letter, one row per recipient, no merge document to build.
See the full walkthrough on mailing a whole client list without a mail-merge headache for exactly how the upload, address-matching, and per-letter pricing works.
Common questions
What fields does a mailing list actually need?
At minimum: a name and a full mailing address (street, city, state, ZIP). Most spreadsheets people already keep — a tenant roster, a client list exported from a CRM, a donor list — already have this. Extra columns (email, phone, account number) are fine to keep in the file; they are just ignored for the mailing itself.
Is a mailing list the same thing as an email list?
No — an email list is for sending email; a mailing list, in the traditional sense used here, is a list of physical addresses for sending physical mail. The two are often confused because "mailing list" got reused for email in the 1990s, but the original, literal meaning is a list you mail things to.
How do I keep a mailing list clean?
The two most common problems are stale addresses (someone moved) and typos (a transposed digit in a ZIP code). Address validation against USPS-standardized data catches most typos before anything prints — every letter sent through paperplane goes through this check automatically, whether it is a single letter or a whole uploaded list.
Do I need special software to use a mailing list?
No. A mail-merge program (Word plus an address list) is one option if you need a different paragraph per recipient. If every recipient gets the identical letter — a rent increase notice, an annual disclosure, a thank-you letter — you can skip mail merge entirely and upload the same spreadsheet directly to a send-many-letters flow instead.