LinkedIn InMail Best Practices: How to Get Replies in 2026

LinkedIn InMail is one of the most underutilised tools in B2B sales. With the right approach, InMails can achieve 25%+ response rates — significantly higher than cold email. Here's how to make every InMail count.

When to Use InMail vs Connection Requests

InMails are best for: C-suite executives unlikely to accept cold connections, time-sensitive outreach (event invitations, limited offers), prospects outside your network with no mutual connections, and re-engaging prospects who didn't respond to connection requests.

Subject Line Strategies

Your subject line determines whether your InMail gets opened. Best practices: keep it under 5 words, ask a question, reference their company or role, create curiosity without being clickbait. Examples: 'Quick question about [Company]', '[Name], thoughts on this?', 'Saw [Company]'s recent growth'.

Optimal InMail Length

Data shows InMails under 400 characters get 22% higher response rates than longer messages. Get to the point quickly: who you are, why you're reaching out, and what you're asking for — all in 3-4 sentences.

Personalisation That Works

Reference something specific: a recent company announcement, their career trajectory, a shared connection, or an industry challenge. Generic InMails ('I was impressed by your profile') are immediately recognised as mass outreach.

The Best Call to Action

Low-commitment CTAs work best: 'Worth a 10-minute conversation?', 'Would it make sense to share how we helped [similar company]?', 'Open to connecting on this?' Avoid 'Let's schedule a 30-minute demo' — too much commitment too early.

Timing Your InMails

Send InMails Tuesday-Thursday, 8-10am in the prospect's timezone. Avoid weekends and Monday mornings. LinkedIn data shows InMails sent on weekdays receive 20% more responses than those sent on weekends.

Managing Your InMail Credits

InMail credits are limited and valuable. Don't waste them on prospects who could be reached via connection requests. Reserve InMails for high-value, hard-to-reach targets where a connection request alone won't suffice.