Direct Mail vs Email: When and Why to Use Each Channel

You don't have to pick sides between direct mail and email. Both channels generate responses — but they do it in very different ways. Direct mail can yield a higher ROI when it comes to response rates, while email lets you reach thousands of contacts in minutes at minimal cost. The real question isn't which one wins. It's how you use each channel's strengths to make the other one more effective.

That's the foundation of a true omnichannel strategy. But before you can combine them, you need to understand where they differ — and where each one shines. Here's what you need to know.

How direct mail and email actually compare

Whether you're weighing where to invest more — or already running both channels — it helps to see what each one actually does well. Let's break it down.

What makes direct mail effective

There's a reason why direct mail open rates can reach up to 90% — it arrives with the recipient's name, in their hands, at their home. So, if youwant to reach customers with their name, purchase history, or location reflected in the piece, customized direct mail is the way to do it. Direct mail gives you format options — postcards, letters, catalogs, dimensional mailers — that create a physical presence email can't match. When someone's inbox gets 100 emails a day, a physical mailer cuts through.

When used on its own and implemented correctly, direct mail yields a13x higher base response rate than email. However, this strategy works even better when combined with other channels. For example, with automation, direct mail is now being sent at scale, integrating directly with Salesforce CRM. This integration cuts execution time from weeks to days, making it possible to trigger personalized mail based on real customer data — the kind of relevance that drives retention and repeat purchases.

Here's what sets direct mail apart from email:

• Direct mail is tangible — recipients can hold it, pin it to a fridge, or leave it on a desk, giving your brand a physical presence that email simply can't replicate
• Direct mail is more memorable than email because it engages multiple senses
• Direct mail doesn't need a lead or prospect's opt-in
• Direct mail has a longer shelf-life than email
• Direct mail can't get caught in a spam filter
• Direct mail doesn't bounce; it either gets forwarded to the right address unlike email or it's been delivered to a new person or potential customer (think "current resident" as a fail-safe on the mailing address)
• Direct mail reaches those who don't use email or spend a lot of time online

Recommended reading: 5 Personalized Direct Mail Examples to Inspire Your Marketing Campaigns

Where email has the advantage

Emailscales faster and cheaper than any other channel. Email remains a core channel for most marketing teams — and investment keeps growing.

Across all industries, the average email open rate is 29.55%, which is lower than direct mail. But email has strengths that direct mail can't match— you can send to thousands in minutes for pennies per contact. Considering 91% of consumers check their email at least once daily on their smartphones, email reaches people on mobile devices in real-time.

• Email is low-cost to produce and send — no printing or postage
• Email is near-instant — campaigns can go live in minutes
• Building your audience is simpler — all you need is an email address
• Email supports deep personalization at scale
• Tracking and analytics are built in — open rates, click-through rates, and conversion data are available immediately

How to pick the right channel for your message

Match the channel to the message: what you're sending, who you're reaching, and how fast you need it there.

Ask these questions to decide between physical mail and email:

• Is your communication time-sensitive?
• How much space do you need for your content?
• Is your customer data accurate?
• Which mailing list is more targeted? Or, which mailing list has the widest reach?
• Do your customers prefer to interact with your brand online or offline?
• Are there budgetary constraints?
• Are there regulatory compliance requirements for this communication?

These questions point you to the right channel — and reveal where direct mail fits naturally into your workflow.

Why both channels work better together

The highest response rates don't come from choosing direct mail or email — they come from using them together. Email is fast and cheap but easy to ignore. Direct mail is tangible and memorable but takes longer to land. When you pair them, the email primes the recipient and the mailer lands with more impact.

The key is having the right data — and then using each channel to lift the other's response rate.

For example:

• Re-engage email non-responders with direct mail. If you have postal address data for unsubscribed users, direct mail may bring them back. See how Lob helped ThirdLove reach users that unsubscribed from email communication.
• Tease a direct mail campaign with email. Planning a special offer or a high-quality personalized mailer? Send a preview via email first to build anticipation.
• Use direct mail to grow your email list. If you have physical addresses but need email opt-ins, send a mailer offering something valuable. You can then grow your email list.
• Hit cart abandonment from both angles. A follow-up email is standard. A follow-up postcard stands out.

Don't create the same message across each channel. Instead, orchestrate direct mail with email so each plays a distinct role in the customer journey.