A postcard feels personal in today’s digital-first world, where inboxes are overflowing with emails and notifications. Holding a tangible postcard gives a slight pause in the day. Postcards capture memories of trips, milestones, and heartfelt greetings for friends and family for personal use.
They provide a direct way for businesses to reach customers with tangible messages that rise above online clutter. Research shows that postcards and other physical mail receive higher open and response rates than email.
The affordability of mailing a postcard is an additional benefit. It is more cost-effective when using bulk postcard mailing services or USPS postcard rules for discounted postage.
If you’re wondering how to mail a postcard efficiently or how to make the most of postcard marketing campaigns, this guide covers everything you need to know. From design and printing to addressing and mailing strategies, we’ll help you learn every step to make your postcards leave a lasting impression.
The Complete Process of Mailing a Postcard

Step 1: Define Your Goal and Target Audience
Before you design or print, the first step is to define your goal. A clear purpose ensures your postcard resonates with the recipient and achieves the desired outcome.
Personal Use
The main purpose of sending postcards is to build an emotional connection between the sender and recipient, whether you are traveling out of station or simply sending a hello message. Personal postcards usually have short handwritten notes, travel photos, or seasonal greetings.
Business Use
Businesses use postcards as a direct mail marketing tool. Below is a list of a few ways postcards can be used in marketing:
- Increase sales and discounts
- Launch new products or services
- Send event invitations
- Foster customer relationships
- Drive website traffic or in-store visits
Know Your Audience
Your postcard’s message and design should match who you’re sending it to:
- Family and friends: Keep it personal, warm, and informal.
- Clients: Use a polished design with clear benefits and a strong offer.
- Prospects: Focus on eye-catching visuals and a simple, curiosity-driven message.
- Community members: Share localized, useful information that fits their daily lives.
Step 2: Get Your Postcard Ready to Mail
After deciding on your goal, it’s time to prepare your postcard for mailing.
Design Essentials
Your postcard design is the first thing recipients notice, so make it count.
- Use strong visuals: Clear, high-quality images or graphics instantly draw attention.
- Choose simple fonts: Simple, clean text makes your message clear.
- Keep text concise: Focus on a brief and impactful message.
- Include a CTA (Call-to-Action): Encourage action with terms like “Visit our website,” “Call today,” or “Redeem your offer.”
Technical Requirements
A few small details can make your postcard look more polished when it’s printed:
- Image quality: Use high-resolution images for a professional-looking postcard.
- Bleed area: Leave a small 1/8-inch border around the edges. This helps avoid unwanted white lines after the card is trimmed.
- Color mode: Use CMYK for printing (not RGB, which is for screens).
USPS Compliance
Meeting USPS postcard rules prevents delays and extra costs. Standard postcards must be:
- At least 3.5” x 5” and no larger than 4.25” x 6” for postcard postage rates.
- Rectangular in shape with uniform thickness.
- Printed on cardstock at least 0.007 inches thick.
Step 3: Know the USPS Rules
It’s important to follow USPS guidelines to ensure your postcard is delivered without delays or extra costs.
Postcard Sizes
USPS distinguishes between:
- Standard Postcards are usually 4” x 6”. They’re the most affordable to mail.
- Oversized postcards can be as big as 6” x 11”. They cost a little more, but they grab more attention in the mailbox.
Every Door Direct Mail (EDDM)
EDDM makes it easy for businesses to send postcards to every home in a selected neighborhood – no mailing list needed. It’s an affordable option that works especially well for local businesses like restaurants, gyms, and service providers.
Address Placement
Postcards must follow strict formatting:
- Right half: Reserved for recipient address, barcode, and postage stamp.
- Left half: Space for personal message or marketing copy.
- Return address: Placed in the upper left corner.
Step 4: Addressing & Personalization
How to Address a Postcard Correctly
When mailing a postcard:
- Write the recipient’s address on the right side.
- Include the full name, street address, city, state, and ZIP code.
- Place the stamp in the top right corner.
- Add your return address in the top left corner if required.
Personalization in Marketing
Personalized postcards deliver better engagement. Instead of sending a generic “Dear Customer,” use the recipient’s name. Tailor offers based on customer data. For example:
- A birthday discount postcard
- A local event invitation for nearby customers
- A reminder postcard for upcoming appointments
Step 5: Print, Sort & Mail Postcards
Printing Options
You have several choices for postcard printing. A few are listed below:
- DIY Printing: Suitable for small batches, but quality may vary.
- Local Print Shops: Provide professional finishes and faster turnaround.
- Online Printing Services: Cost-efficient for bulk postcard mailing with delivery options.
Paper Quality
The paper you choose affects durability and perception:
- Standard cardstock: Affordable and practical.
- Premium finishes: Glossy or matte coatings enhance appeal.
- UV coating: Protects postcards from wear and tear during mailing.
Sorting & Mailing
For bulk mailings, proper sorting is required:
- Organize by ZIP code for USPS automation.
- Separate postcards for different campaigns.
- Attach bulk mail permits if applicable.
Step 6: Tracking & Reporting
The ability to monitor results is a key benefit of contemporary postcard campaigns.
Techniques for Monitoring
- QR codes: Direct recipients to a website and keep an eye on scans.
- PURLs (Personalized URLs): distinct web addresses for every recipient to monitor interaction.
- Promo codes: Monitor conversions from postcard offers.
Monitoring & ROI
Tracking tools allow businesses to measure:
- Response rate
- Conversion rate
- Cost per acquisition
- Overall return on investment (ROI)
Common Printing Mistakes to Avoid
Many businesses waste time and money by making avoidable mistakes. Common errors include:
- Utilizing blurry, low-resolution photos.
- Ignoring USPS size regulations causes mail to be returned or delayed.
- Putting too much text or images into the design.
- Ignoring margin and bleed specifications results in graphics that are cut off.
Avoid These Mistakes When Mailing Postcards
Errors in mailing can also lessen efficacy. Avoid:
- Choosing incorrect postage rates for large cards.
- Mailing without confirming addresses.
- Postcard delivery may be delayed if they are sent during the busiest holiday mail seasons.
- Losing out on engagement opportunities by not personalizing content.
Best Optimization Strategies for Mailing Postcards
To maximize the power of postcards, adopt these strategies:
- Use clear, bold CTAs that tell recipients exactly what to do next.
- Segment audiences to deliver more relevant messages.
- Test designs (A/B testing) to see which visuals and messages perform best.
- Combine offline and online marketing by integrating digital tools such as QR codes.
- Mail consistently to build brand familiarity and customer trust.
These strategies ensure your postcard campaigns deliver long-term value.
Seamless Postcard Printing and Mailing Solutions | Compu-Mail
Postcard marketing is made easy and efficient with Compu-Mail. With captivating designs and powerful messaging, our professionals are here to assist you. To make sure the correct audience see your postcards, we give you access to verified mailing lists. You can also save money by taking advantage of our bulk mailing discounts. Advanced tracking tools make it simple to monitor performance in real time. Compu-Mail ensures on-time delivery and complies with USPS regulations. This helps you stay focused on your overall marketing strategy.
Frequently Asked Questions
Q: What is the best way to mail a postcard?
A: Write your message on the left, and the recipient’s address on the right. Place a stamp in the top-right corner, leaving space at the bottom for the barcode.
Q: What are the rules for mailing postcards?
A: The postcards must be at least 3.5” x 5” and no larger than 4.25” x 6” to avail postcard postage rates. They must be printed on cardstock, which is at least 0.007 inches thick.
Q: How do you make an effective postcard?
A: An effective postcard grabs attention and delivers a clear message. Use a bold headline, strong images, a clean design with white space, and a clear call-to-action (CTA) on the front.
Q: Where should you not write on a postcard?
A: Don’t write on the front of the postcard or in the postage area on the right side. Avoid adding any text below the “Do not write below this line” section or outside the spaces meant for the address and message.
Compu-Mail, LLC
Compu-Mail, LLC is a leading provider of secure communications, direct mail, omnichannel marketing, commercial print, and promotional products. Since 1983, Compu-Mail has helped organizations achieve...
Compu-Mail, LLC is a leading provider of secure communications, direct mail, omnichannel marketing, commercial print, and promotional products. Since 1983, Compu-Mail has helped organizations achieve their communication goals through innovative technology, data-driven strategies, and a steadfast commitment to compliance. The company maintains SOC 2 Type II, SOC 3, HIPAA-Certified Facility, PCI-DSS, USPS Election Mail, G7, and HITRUST certifications, ensuring the highest standards of security, quality, and operational excellence. Compu-Mail writes about direct mail, compliance, data security, postal regulations, and marketing strategies that drive results.



