How to Write Email Subject Lines That Students Open

There is a book every enrollment marketer should read.

Mailed It by Dayana Kibilds and Ashley Budd is the clearest, most practical guide to higher education email marketing I have come across. If you have not read it, stop here and add it to your list.

The framework Kibilds and Budd lay out for thinking about email — who it is for, what it is trying to do, and whether it is actually earning its place in a student's inbox — should inform how every enrollment team approaches the channel.

When I first read it I not only learned but felt validated in so many decisions I was making in my own communications.

And while I could talk about email (I'll leave that to them), I intentionally just want to talk about one narrow topic: the subject line.

Because the subject line is the only part of your email that has to earn the open. Everything else — the content, the call to action, the beautiful design — none of it matters if the student never gets there.

What the research says

Before we get into tactics, a few things worth knowing.

1. Subject lines that include a student's first name have been shown to produce higher open rates. Personalization works — with a caveat. Today's students are increasingly savvy about automated personalization. They know their name in a subject line does not mean a human wrote it for them. It can still help, but it is not the differentiator it once was. I wouldn't use it in every email, but choose judiciously.

   
   

2. Subject lines under 40 characters tend to perform better on mobile, where most students are reading email. Long subject lines get cut off. The result is a truncated message that loses context and often loses the open.

   
   

3. Emojis in subject lines can work — with two important considerations. First, if an emoji makes contextual sense, it can add warmth and help a message stand out in a crowded inbox. If it feels forced, it does the opposite. Second, emojis are not always rendered correctly by screen readers, which creates accessibility concerns. If you use them, place them at the end of the subject line rather than the beginning, and never rely on them to carry meaning the text doesn't also convey.

   
   

4. Preheader text matters more than most enrollment teams realize. The preheader — the short line of text that appears in the inbox preview next to or below the subject line — is essentially a second subject line. Most email clients display it. Most enrollment emails waste it by defaulting to "View this email in your browser" or the first line of body copy. A preheader that complements and extends the subject line increases opens meaningfully. Think of the subject line and preheader as a team: the subject line makes the promise, the preheader adds context.

What works in email subject lines

The subject lines that consistently perform best in enrollment email share a few characteristics.

1. They are clear and direct. In consumer marketing, mystery subject lines — "You won't believe what we have for you" — can work because the relationship between brand and customer is often casual and entertainment-driven. In enrollment, the relationship is high-stakes and anxiety-adjacent. Students are making one of the biggest decisions of their lives. They do not have patience for vague. They want to know what is in the email before they open it.

   
   

2. They tell the student what they will get. The best performing subject lines in enrollment tend to be informational: "Your financial aid package is ready," "Three things to know before May 1," "Your housing options for fall 2025." These work because they answer the question every student is unconsciously asking when they look at their inbox: Is this worth my time right now?

   
   

3. They match what is actually in the email. This sounds obvious. It is violated more than you would think. A subject line that promises clarity and delivers jargon erodes trust, not just in that email, but in every email that follows. Students learn quickly whether your emails are worth opening.

What might be working against you

The mystery subject line used repeatedly. A subject line like "Something exciting is coming your way" might drive an open once. Used three or four times across a comm flow, it trains students not to trust you. This is the boy who cried wolf problem applied to email. If students learn that your mysterious subject lines never deliver on the intrigue, they stop opening them.

Urgency language that has no specificity. "Don't miss out" and "Last chance" work best when paired with specific stakes — a real deadline, a real consequence, a real benefit to acting now. Without that specificity, urgency language feels like pressure rather than information. And pressure creates avoidance, not action.

Inconsistency in sender name. Who the email appears to come from matters, especially at later stages of the funnel. A student who has been in conversation with a specific admissions counselor may respond very differently to an email from "Sarah at Lakewood University" than to one from "Lakewood University Admissions." Think carefully about who is sending the email at each stage of the process — the relationship context changes what a student will open.

Ignoring the stage the student is in. A subject line that works for a student who received their admission letter last week may be completely wrong for a student who deposited two months ago and is now in a summer communication flow. Subject lines should be calibrated to where the student is emotionally and logistically, not just to what the institution needs to communicate.

A simple framework

Before you write a subject line, answer three questions:

1. Who is receiving this email, and where are they in the enrollment process?

2. What is the one thing I want them to do or feel after reading it?

3. How do I signal that clearly and directly in 40 characters or less?

If you can answer all three, you can write the subject line. If you cannot answer the first two, you are not ready to write the email yet.

The subject line is a promise.

Students are opening your email to see whether that promise is kept. The enrollment teams that understand this write better subject lines — and build stronger relationships with prospective students in the process.

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At Square One Consulting, I help enrollment and marketing teams build email strategies that are genuinely designed for the students receiving them.