Why does no one open my InMail on LinkedIn, and what can you do about it?

Why does no one open my InMail on LinkedIn, even when the content of the message is good?

Many recruiters recognise this situation. You write a careful message, explain the role clearly and try to be personal. Yet it stays quiet. Sometimes there's no reply, and sometimes the InMail isn't even opened. This quickly raises the question: why does no one open my InMail on LinkedIn, when the vacancy seems like such a good fit?

The cause often lies more in the process than in the text itself. Candidates first make a small decision. They decide whether the message is worth opening. That decision is mainly shaped by the subject line and the context it reveals.

Most recruitment teams therefore look at their figures first. The average open rate for InMails on LinkedIn is often around 50 to 60 percent. Many teams use this as an InMail benchmark for recruiters. Campaigns with clear subject lines and a sharply chosen target audience regularly achieve higher percentages. Anyone who wants to see how a large recruitment team improved its approach can look at this real-world case with Manpower, in which the use of InMails was structurally adjusted.

Why does no one open my InMail on LinkedIn, if your subject line gives no clear reason to click?

The subject line is the first thing a candidate sees. On mobile, a large part of the text is often cut off, so only the first few words remain visible. If there's no clear context there, there's little reason to open the message.

Many subject lines are too long or too generic. Examples include phrases like "Quick introduction" or "Interesting for you." The reader then has no idea what the message is about. In a full inbox, a message like that easily fades into the background.

Generic marketing language also works less well. Phrases such as "Unique opportunity" or "Top role in your area" come up often. Candidates quickly recognise this as generic outreach. That makes the message feel less personal and reduces the chance it gets opened.

A better InMail subject line is usually short and concrete. In many situations, three to seven words work best. The line refers to the candidate's work or to a recognisable area of expertise. That way the reader immediately understands why the message might be relevant.

• Weak: "Top role for you in your area"
• Better: "Senior Java role at a high-traffic platform"
• Weak: "Quick introduction"
• Better: "Your move into in-house marketing"
• Weak: "Interesting role for a finance professional"
• Better: "Controlling role at a SaaS company"

For developers, referencing a specific technology often works well. For finance professionals, a subject line can reference IFRS reporting or a scale-up environment. Marketing specialists respond more often to terms that name their niche, such as performance marketing or e-commerce growth. Using this context creates a stronger InMail subject line that fits seamlessly with the candidate's day-to-day work.

Why does no one open my InMail on LinkedIn, when the send time is unfavourable?

Timing determines how visible a message stays in the inbox. LinkedIn notifications and emails often arrive in waves. When an InMail lands at a busy moment, it quickly sinks down among the other notifications.

LinkedIn messages sent on a Friday afternoon, for example, often get less attention. Many professionals are busy wrapping up or planning their weekend by then. As a result, new messages are read later, or forgotten altogether.

Monday morning has a similar effect. Many people start their week with internal tasks and an overflowing inbox. At that moment, an unfamiliar InMail gets a lot less priority.

The best time to send an InMail varies by target audience. Recruiters therefore often start by testing two or three fixed moments. Tuesday and Wednesday in the late morning or early afternoon work well in many situations. Comparing the results gradually builds insight into how your specific target audience behaves.

Small adjustments like these often help improve your LinkedIn outreach, without needing to send more messages.

Why does no one open my InMail on LinkedIn, when the target audience is chosen too broadly?

Some professionals receive several InMails every week. Developers, experienced marketers and specialised finance profiles in particular regularly receive messages from recruiters. This creates high inbox pressure. A message with little context then quickly feels generic.

An important part of getting better results is therefore deliberately selecting your InMail target audience. Look beyond job titles alone. Activity on LinkedIn, recent career moves and how long someone has been in their current role often provide valuable information. Someone who's just started at a new employer is usually less open to a conversation.

A smaller, more targeted audience feels more relevant. That increases the chance a candidate opens the message and actually replies. Many agencies working with high volumes therefore use a tailored approach to their segmentation. For teams with a lot of outreach, we've developed a specific approach for recruitment agencies that helps combine scale and personalisation more effectively.

Why does no one open my InMail on LinkedIn, if you never test what works?

Many teams use the same approach for months without measuring what happens. This means it stays unclear which subject lines or send times work best. A/B testing InMails helps make this clearly visible.

In a simple test, you create two variants of a subject line, while the rest of the message stays the same. You then send both variants to comparable candidates. This quickly reveals which version gets opened more often.

A good test changes only one factor at a time. When you adjust the subject line, timing and target audience all at once, it becomes hard to understand exactly what's causing the difference.

The first metric to look at is usually the open rate. After that, you look at the reply rate and the quality of the responses. Ultimately, of course, it's about conversations that fit the role. Many teams therefore use clear formats for their outreach. Working with fixed structures keeps testing fair and consistent. Some teams use systems for working with fixed templates and instructions, so successful formats can easily be reused later.

How context and personalisation help you get more opens on LinkedIn

Personalising your InMails as a recruiter means using information from the LinkedIn profile to show the relevance of the message. That could be a technology someone works with, a project they've shared, or a recent job change. When the subject line refers to that, the message immediately feels recognisable.

The opening line of the message then ties in nicely with that context. This immediately helps the candidate understand why you're reaching out. This approach often leads to more opens on LinkedIn, because the message directly connects with the reader's work.

Strong subject lines usually come from genuine context, not clever trick words. That's why we help recruiters write InMails based on information from the LinkedIn profile and the purpose of the contact moment. This happens directly within LinkedIn Recruiter, so it fits perfectly into the daily workflow. Anyone who wants to see how that process works can take a look at our InMail module for recruiters, which supports this step by step.

Recruiters always keep control over the content themselves. They review every message before it's actually sent. That way the tone always stays personal and true to their own style.

Summary of the main causes behind low open rates

When recruiters ask themselves, "Why does no one open my InMail on LinkedIn?", the answer usually turns out to be surprisingly simple. In many situations, the problem simply lies with the subject line, the send time, or the chosen target audience. By deliberately improving these three elements, the chance a message actually gets opened rises considerably.

A clear subject line immediately shows why the message might be relevant. A well-chosen send time keeps the message visible among all the other notifications. Finally, a sharp target audience selection increases the chance the content genuinely matches the candidate's interests.

Sending more messages usually doesn't solve the problem. Better context and targeted personalisation, on the other hand, often lead to far stronger results. Recruiters who want to improve their approach are therefore best off analysing their own process first. If you'd like to talk through your current results, you can easily book a short introduction call, so we can look together at where the most improvement is possible.

Frequently asked questions about InMail open rates

What's a good open rate for InMails in recruitment?

Many teams see an open rate between 50 and 60 percent as completely normal. This is often used as an InMail benchmark for recruiters. Campaigns with clear subject lines and a well-chosen target audience can, however, reach towards 70 percent or even higher.

Why does no one open my InMail on LinkedIn, when the vacancy is a good fit?

The content of the vacancy is only read after someone decides to open the message. If the open rate stays low, the cause usually lies with the subject line, the timing of the message, or the chosen target audience.

What's usually the best time to send an InMail?

There's no universally perfect moment. Many recruiters start by testing on Tuesday, Wednesday or Thursday in the late morning or early afternoon. Comparing different time slots naturally reveals what works best for your target audience.

How many InMails do you need for a reliable A/B test?

A test works best when both variants are sent to a comparable number of candidates. The larger the group, the more reliable the outcome. Small numbers simply make the results more prone to chance.