How to Write Email Subject Lines That Drive Action with Volunteers

Getting someone to open your email is harder than it’s ever been. If you’re trying to recruit or engage volunteers, the last thing you want is your message getting lost in a crowded inbox. The email subject line is your first (and sometimes only) chance to catch someone’s attention, and convince them to take the next step.

The challenge? It’s tough to stand out when everyone is trying to grab attention. And if you’re used to traditional outreach, it can be hard to know what will actually make your message pop in today’s inbox. That’s why your subject line matters.

Nonprofit volunteer opening and reading email from nonprofit about a volunteer opportunity

Why Your Subject Line Matters More Than You Think

Your email might contain the most inspiring story, the clearest instructions, or the most impactful opportunity, but none of that matters if no one ever opens it. Volunteers are busy. They’re balancing work, family, and about a hundred other things.

In the middle of all that, your subject line is what helps them decide: Is this worth my time?

A strong subject line creates a pause, a spark of curiosity, or even a sense of urgency. It’s the difference between someone scrolling past your email and someone thinking, “This looks like something I should check out.”

Keep It Simple, Personal, and Real

When you’re writing subject lines, picture how you’d text a friend. It should feel conversational, specific, and a little casual. Avoid broad, generic phrases like “Volunteer Opportunity” or “Join Us Today.” That kind of language blends in with every other mass email.

Instead, try subject lines that sound like they were written for one person:

  • "Can you lend a hand this Saturday?"
  • "We saved you a spot on the clean-up crew"
  • "Want to do something meaningful this weekend?"

These feel more human, speak directly to the reader, and tell them what they can expect. 

Match the Subject Line to the Person

Not all volunteers are the same, and your subject lines shouldn’t be either. If you’ve got a mix of longtime helpers and brand-new sign-ups, tailor your message.

For returning volunteers:

  • "Loved having you at the food drive—want to join again?"
  • "This time, you're on the VIP list. Food Drive 2.0."

For first-timers:

  • "Quick intro: How you can help in just 2 hours"
  • "You + 2 hours = big difference for local kids"

By matching the subject line to their experience, you’re not just sending an email, you’re showing that you see them and value their involvement.

A volunteer carried food supply box during nonprofit food drive event

Give Them a Reason to Click

Sometimes curiosity is the best motivator. You don’t need to rely on gimmicks, but a subject line that hints at something meaningful inside can spark interest:

  • "Our volunteers pulled off something amazing last weekend..."
  • "What 12 people did in 3 hours will surprise you"

The key is balance. You want to be intriguing without crossing into clickbait. Volunteers want to feel like they’re part of something real, important, and worth their time. A thoughtful subject line should reflect that.

Ready to Reach More Volunteers?

If your emails aren’t getting opened, your message isn’t being heard. The good news? A little strategy goes a long way. When you keep things simple, personal, and intentional, you’ll not only get more people opening your emails, you’ll also get more people showing up to help.

Want more than just subject line advice? Book a demo with one of our product experts. We’ll show you how Levitate helps nonprofits build authentic, personal email campaigns that actually drive results.

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