LinkedIn InMail best practices that actually get replies

Length, subject line, and structure.

Short wins. A long InMail asks for attention before it has earned any. The easiest edge available to you is to cut the message in half.

The subject line decides whether it opens

Unlike a connection request, an InMail has a subject line, and it is the first and sometimes only thing the prospect sees. Keep it to roughly 50 characters so it does not get clipped on mobile, and make it hint at a specific value or reference something true about them. “Idea for [Company]” or “Saw your post on SDR ramp time” are stronger than “Quick question”, because they promise relevance instead of mystery.

Structure: hook, reason, one question

The body that works is three short beats. Open on something specific to them. Give one credible reason you are reaching out. Close with a single low-friction question, not a calendar link. “How are you handling this today?” is easier to answer than “Got 15 minutes Thursday?” because it asks for an opinion, not a slot in their week.

Personalization that actually lands.

“Personalised” does not mean swapping in a first name. It means the message could only have been written to this one person.

Tie the message to a real signal

The InMails worth sending reference something current: a recent post or comment, a funding round, a new role, an open hire, a product launch. These are the same buying signals you should be building your list around in the first place. A signal gives you a true, specific reason to be in their inbox this week rather than any other.

It also pays to warm the prospect up before the InMail lands. Viewing their profile, then liking or thoughtfully commenting on a recent post a day or two earlier, makes your name familiar. Your InMail then reads as a follow-up to a real interaction, not a cold intrusion.

When to send, and how to follow up.

Timing will not rescue a weak InMail. Send on a weekday, in the morning or early afternoon in the recipient's timezone, and keep weekends off the calendar. Do not over-engineer this.

Follow up on another channel

If an InMail gets no answer, do not hammer the same inbox. Switch channel, for instance to a connection request, and add something new at each step rather than “just bumping this”.

InMail or a connection request.

InMail is not always the right move, and treating it as the default wastes both credits and your best reply rates. The two channels do different jobs. InMail reaches people you are not connected to, immediately, with a subject line, and it costs a credit. A connection request is free, has no subject line, allows only a short note, and only opens a conversation if they accept.

A practical rule: spend InMail credits on your highest-value, hardest-to-reach prospects where a 50-message monthly budget forces selectivity, and run the rest of your pipeline through connection requests.

Credits, limits, and account safety.

Sales Navigator gives you 50 InMail credits a month, accruing up to a ceiling of 150. Every InMail that earns a reply within 90 days refunds its credit, so good messages effectively cost nothing. That maths punishes blasting and rewards selectivity, which is the right incentive.

The other risk is the account itself. Third-party automation is what gets a profile suspended. We unpack the restriction types in what to do when an account gets restricted.

• Write each InMail individually, not one copy pasted across recipients.
• Pace sends across the week and across the day, not a fixed batch at the same time.
• Treat the credit refund as a quality metric: a low refund rate means your messages are not landing.

This is the core of how Occura runs outreach. Real in-house setters write every InMail by hand on dedicated accounts branded as your business, paced like a person, so your own profile is never used.