When planning a direct mail campaign, one of the first decisions you will face is format. Should you send a postcard or a letter? Both are proven tools in direct mail, but they serve different purposes and perform differently depending on your goal.

If you are trying to get the most out of your marketing budget, understanding when to use each format can make a real difference.
Why Postcards Work
Postcards are one of the most efficient tools in print marketing. They are simple, cost effective, and designed to deliver a message quickly.
The biggest advantage of a postcard is visibility. There is no envelope to open, which means your message is immediately seen. This makes postcards a strong option for promotions, announcements, and brand awareness campaigns.
Postcards also work well with EDDM campaigns. If you are targeting a specific geographic area without a mailing list, postcards allow you to reach every household on a route at a lower cost.
Best uses for postcards:
- Sales and promotions
- Event announcements
- New business introductions
- Local awareness campaigns
- High volume EDDM mailings
Because they are shorter, postcards rely heavily on strong design and a clear call to action. You have limited space, so every word and visual matters.
Why Letters Still Matter
Letters take a different approach. They require more effort from the recipient, but they also create a more personal experience.
When someone opens an envelope and reads a letter, they are more likely to spend time with your message. This makes letters ideal for more detailed communication, especially when trust and connection are important.
For nonprofits, letters are often the better choice. Fundraising appeals, donor updates, and personalized messages tend to perform better in letter format because they feel more intentional and less like advertising.
Best uses for letters:
- Fundraising campaigns
- Donor communications
- Detailed offers or explanations
- High value or high consideration services
- Personalized outreach
Letters also allow for more customization. With variable data printing, you can tailor each message to the recipient, which can improve response rates.
Cost vs. Impact
Postcards are typically more affordable to print and mail. There are fewer materials involved, and postage is often lower. This makes them a strong choice for businesses that need to reach a large audience without overspending.
Letters, on the other hand, come with higher production and mailing costs. You have the envelope, the letter itself, and sometimes additional inserts. However, the increased engagement can justify the cost, especially for campaigns where each response is valuable.
The decision often comes down to your goal. If you need reach and frequency, postcards are hard to beat. If you need depth and connection, letters are usually the better investment.
Response Rates and Strategy
There is no one size fits all answer when it comes to performance. Both formats can deliver strong results when used correctly.
Postcards tend to generate quick responses. They are ideal for short term campaigns where you want immediate action. Letters tend to generate more thoughtful responses, especially when the message requires explanation or emotional connection.
In many cases, the best strategy is to use both. A postcard can introduce your message and build awareness, followed by a letter that provides more detail and drives action.
Choosing the Right Format
Before you decide, ask a few simple questions:
- What is the goal of this campaign?
- How much information do I need to share?
- Who is my audience?
- What is my budget?
If your message is simple and you want to reach as many people as possible, postcards are likely the right choice. If your message is more complex or personal, letters will usually perform better.
Final Thoughts
Both postcards and letters play an important role in direct mail. The key is choosing the format that aligns with your message and your audience.
At Inkwell Printing Company, we help businesses and nonprofits plan, print, and deliver campaigns that get results. Whether you are launching a postcard campaign or sending a personalized letter, the right format can make all the difference.
Contact us with any of your printing and direct mail needs!
For more helpful information check out our blog at: /advice-from-the-printer/
And for more information on Inkwell Printing Company check out our website at: www.inkwellstl.com








