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Everything About Mailing Lists
What is a mailing list?
A mailing list is a collection of names and postal addresses used to send direct mail to a specific audience. With PostGrid, you build a targeted list from filters: for a consumer (B2C) list, you can filter by location, age, income, gender, education, occupation, home value, and number of children; for a business (B2B) list, you can filter by ZIP code, industry, NAICS code, company type, employee count, and founding year.
How does a mailing list work?
A mailing list works by gathering contact data filtered by location and specific demographic or firmographic criteria, allowing you to target a specific audience and send direct mail campaigns to verified recipients.
What are the benefits of getting mailing lists?
Getting a mailing list allows you to reach a highly targeted audience by filtering contacts using specific geographic, demographic, or firmographic criteria. This focused approach improves campaign ROI and conversion rates by eliminating wasted spend on uninterested audiences while saving time by removing the need to manually source and verify customer data. Additionally, mailing lists enable personalized marketing tailored to specific customer segments and help ensure higher deliverability through verified recipient records.
What are the different types of mailing lists?
Both consumer (B2C) and business (B2B) lists across hundreds of audience types — homeowners, new movers, high-income households, and seniors on the consumer side, and industry lists such as dentist, attorney, physician, real estate agent, CPA, and contractor on the business side. Browse the full list directory above.
What is the difference between Mailing List & Email Lists?
The main difference between a mailing list and an email list lies in the channel and format of delivery. A mailing list consists of physical street addresses used to send tangible marketing materials delivered by postal services. In contrast, an email list contains digital email addresses used to deliver electronic messages, such as newsletters, automated campaign sequences, and product updates, directly to recipients' inboxes. While physical mailing lists typically involve higher costs per contact due to printing and postage, they often achieve higher engagement and open rates. Email lists feature near-zero marginal sending costs and instant delivery with real-time digital tracking, though they require careful management to avoid spam filters.
HOW IT WORKS
How to Build a Mailing List with PostGrid
From filters to a mailed campaign in four steps, build the list and send the mail in one platform.
Choose Filters
Choose between US Consumers or US Businesses, define your target address or ZIP code, and set your radius.
Review the Quote
PostGrid returns the exact number of matching contacts and the price per contact, with masked preview records to sanity-check the list.
Confirm & Build
Refine filters to fine-tune the count, then confirm. PostGrid builds the mailing list and it appears in your account.
Send Direct Mail
Use the list right away to send letters and postcards through PostGrid's print & mail API, no export, no separate mail house.
USE CASES
Who Uses Mailing Lists?
Any team running direct mail that needs to reach a precise, targeted audience.
Launch postcard and letter campaigns to a hand-picked audience, filter to your ideal customer, then mail them without leaving PostGrid.
Build account lists by industry, NAICS code, company size, and location to reach decision-makers at the exact firms you want.
Target homeowners, new movers, and specific neighborhoods with a ZIP-radius consumer list for farming and lead-gen mailers.
Reach dentists, physicians, attorneys, CPAs, and other professionals with industry-specific business mailing lists.
Prospect new donors by income, age, and geography, then send appeals and acknowledgements as direct mail.
Blanket a trade area with a hyper-local consumer list, every household within a radius of your storefront.
COMPARISON
PostGrid vs. a Traditional List Broker
A quick, factual comparison of building your mailing list with PostGrid versus buying a static file from a data broker.
| Capability | PostGrid | Traditional List Broker | Scraped / DIY List |
|---|---|---|---|
| Build to filters (B2B & B2C) | ✓ Self-serve, on demand | Sales rep & quote cycle | ✗ Manual |
| See count & price before you buy | ✓ Instant quote | After a call | ✗ N/A |
| Preview sample records first | ✓ Masked previews | Sometimes | ✗ No |
| Pay per contact (no bulk minimums) | ✓ Yes | Often package minimums | Free but low quality |
| Send direct mail to the list | ✓ Same platform | ✗ Export to a mail house | ✗ Export elsewhere |
| API to build & mail programmatically | ✓ Full REST API | ✗ Rarely | ✗ No |
| Enterprise security & compliance | ✓ HIPAA / SOC 2 Type 2 | Varies | ✗ None |
| Best for | Teams building recurring or automated campaigns | Slower, enterprise one-time bulk orders | In-house web scraping (high bounce risk) |
SECURITY & COMPLIANCE
Enterprise-Grade Security & Compliance
Your list and campaign data are handled under the strictest certifications in the industry.
HIPAA Compliant
PHI-safe handling for healthcare mail, with BAAs available.
SOC 2 Type 2
Independently audited security, availability & confidentiality controls.
PCI DSS
Payment-data-safe processing for mail containing financial information.
PIPEDA
Compliant with Canada's federal personal information protection law.
PHIPA
Ontario health-privacy compliant for cross-border healthcare mail.
Integrates with Your Favorite Tech Stack & Tools
Easily Improve your workflow and automate print & mail through seamless integration capabilities.
TRUST SIGNALS
Our Customers Say It Best
Hear from the teams that run their direct mail and data on PostGrid.
”Being able to build the list and mail it in the same platform cut our campaign turnaround from weeks to a single afternoon. Seeing the count and price before buying is a game-changer.
Director of MarketingHome Services Company”"The API is fully documented and simply works. We build targeted B2B lists by industry and company size, then trigger the mailer programmatically — no exports, no mail house."
Vice President of EngineeringSaaS Company”"We prospect new donors by geography and income and send appeals straight from PostGrid. HIPAA and SOC 2 compliance made the data team comfortable from day one."
Director of DevelopmentNational Nonprofit
FAQ
Mailing Lists: Frequently Asked Questions
Straight answers to the questions businesses ask before building a mailing list.
How to use a mailing list?
To use a mailing list, start by identifying your target audience and acquiring or generating your verified list through a list provider or building tool and uploading it into your direct mail or marketing platform. Finally, design tailored promotional materials or messages, schedule your dispatch, and track campaign performance metrics like delivery rates and customer responses to optimize future outreach.
How to build a mailing list?
Choose filters for a US consumer or US business audience, and PostGrid generates a quote with the number of matching contacts and the price per contact, plus masked preview records to sanity-check the list. Adjust the filters to refine the count, then confirm the build. Once built, the list is ready to mail directly through PostGrid.
How much does a mailing list cost?
Lists are priced per contact and deducted from your account credits, which are displayed in your quote before you confirm. Request a demo for volume pricing. Targeted list building is a beta feature that must be enabled on your account.
How to send direct mail to a mailing list?
A list you build becomes a PostGrid mailing list you can use immediately to send letters and postcards through PostGrid's print and mail API or dashboard. Unlike a data broker that only sells you a file, PostGrid builds the list and mails it in one platform.
How to send personalized direct mail to a big mailing list?
To send personalized direct mail to a large mailing list, start by organizing your recipient database into a clean file (like a CSV) with dedicated columns for personalized fields such as names, addresses, purchase history, or custom offers. Next, integrate your list with an automated print and mail platform or direct mail API, such as PostGrid, that supports variable data printing (VDP) to dynamically swap text, imagery, or QR codes for each individual recipient. Finally, create a standardized HTML or design template featuring variable tags (like {{first_name}} or {{custom_offer}}), preview a sample batch to verify data alignment, and launch the campaign for automated printing, sorting, and delivery.
LIST DIRECTORY
Browse All Mailing List Types
Explore consumer and business mailing lists by category. Select a list type to learn what filters are available and how to build it.
Consumer & Demographic
Education
Energy, Utilities & Agriculture
Executives, HR & Management
Finance & Insurance
General & Business Lists
Government & Public Sector
Healthcare & Medical
Hospitality & Food Service
Legal
Manufacturing, Logistics & Industrial
Media, Marketing & Professional Services
Nonprofit & Associations
Occupations & Individuals
Real Estate, Construction & Trades
Retail & Consumer Services
Technology & IT
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