LinkedIn InMail reaches prospects you cannot connect with — people outside your network, second and third-degree connections who ignore connection requests, and executives who turned off connection request notifications entirely. But most InMails fail not because InMail does not work, but because they are too long, too vague, or open with a pitch before establishing any relevance. InMails that get replies are short, specific, and ask for something small. This guide covers the templates and the structure behind them.
Short answer: LinkedIn InMails under 400 characters get significantly higher response rates than longer messages. The winning structure is: one line of specific context, one line connecting that context to an outcome, one low-friction ask. Use InMail when you cannot connect through a mutual, when the prospect's connection acceptance rate is low, or when you are targeting executives who filter their connection requests. Use connection requests when you share mutual connections or groups that provide natural context.
InMail vs Connection Request: When to Use Each
The choice between InMail and a connection request affects reply rate and deliverability. Neither is universally better. The decision depends on your relationship to the prospect and your goal for the first touch.
Use InMail when:
- The prospect is three or more degrees removed from you and you share no mutual connections or groups.
- The prospect's profile shows low connection activity, suggesting they filter requests heavily.
- You are targeting senior executives (VP+) who receive dozens of connection requests per week and rarely accept from people outside their existing network.
- You have LinkedIn Recruiter or Sales Navigator with InMail credits, and the prospect is a high-value target worth spending a credit on.
Use connection requests when:
- You share mutual connections who are relevant to the prospect's work.
- You share a LinkedIn group with the prospect — group membership connection requests carry implicit context.
- The prospect is actively building their LinkedIn presence (regular posts, comment activity) and is more likely to accept requests from adjacent network members.
- You are doing volume outreach on a verified ICP list where per-prospect InMail credit spend is not justified.
In practice, a multi-channel sequence often uses both: a connection request as the opening touch, and an InMail to the non-acceptors after 5 to 7 days. This approach covers both pathways without burning InMail credits on prospects who would have accepted a connection request. The full sequence architecture for combining both is covered in the LinkedIn outreach automation guide.
What Makes an InMail Actually Get Read
Three variables determine whether an InMail gets opened and replied to: subject line, length, and opening line. Most templates fail on one or more of these.
Subject line. LinkedIn InMail subject lines function like cold email subject lines but with less space. Five to seven words, no clickbait, no question marks that sound like ad copy. The subject line that consistently outperforms others is a direct statement of the specific thing you noticed: "Saw your Series B announcement" or "Your post on outbound attribution" or "Question about your SDR team structure." Specific over clever, every time.
Length. InMails under 400 characters (roughly 60 to 80 words) get meaningfully higher response rates than longer messages. This is not a formatting preference. It reflects how InMails are read: on mobile, with two seconds of attention before the prospect decides to reply or archive. A long InMail signals the sender did not respect the prospect's time. A short InMail signals confidence. Keep everything under 100 words. If you cannot make your point in 100 words, the offer is not clear enough yet.
Opening line. Never open with a pitch, a compliment, or a sentence about yourself. The opening line should reference one specific, verifiable thing about the prospect: a post they made, a company milestone, a hire they made, an industry challenge specific to their segment. One line. Then the pivot to why it is relevant to them. Then the ask.
InMail performance by length: InMails between 25 and 50 words outperform messages over 200 words in response rate, with the gap widening on mobile. Subject lines under 8 words outperform longer subjects. These patterns hold across B2B verticals including SaaS, professional services, and enterprise tech. Source: LinkedIn's own published benchmark data and independent B2B outreach studies, aggregated from multiple industry reports through 2025.
Eight InMail Templates by Use Case
These templates follow the structure above: specific observation, relevant pivot, low-friction ask. Each is designed to be under 100 words. Customize the bracketed fields per prospect. Do not send these as-is without personalizing the opening line.
Cold B2B Outreach Templates
Template 1: Funding trigger
Subject: Congrats on the Series A
Hey [first name], saw the announcement — congrats on the raise. We help [company type similar to theirs] book 15 to 25 more meetings per month during growth phases like this, without adding headcount. Would a 15-minute call next week be worth it to compare notes? Happy to share what is working for others at your stage.
Template 2: Job change trigger
Subject: New role at [company]
Hey [first name], noticed you just moved to [company] — congrats. A lot of [their role title]s in [their industry] are dealing with [specific challenge] when they start in a new seat. We help teams like yours [specific outcome] in the first 90 days. Worth a quick call to see if it applies to your situation?
Agency Pitch Templates
Template 3: Results-first agency pitch
Subject: Outbound results for [industry]
Hey [first name], we recently helped a [company type similar to theirs] book [X] qualified meetings in 30 days using a [channel] + [channel] sequence. Your ICP looks similar to theirs. Happy to share the exact playbook on a 20-minute call — no pitch, just what worked and whether it fits your situation.
Template 4: Deliverability-focused pitch
Subject: Your cold email infrastructure
Hey [first name], noticed [company] is scaling outbound. We specialize in fixing the deliverability issues that cap reply rates — most teams lose 30 to 40 percent of their emails to spam before any copy issue matters. If you want to see what your current infrastructure is actually delivering, I can run a free audit. 10 minutes?
Recruiter Templates
Template 5: Specific role InMail
Subject: [Role title] opportunity at [company]
Hey [first name], came across your profile while sourcing for a [role title] at [company]. Your background in [specific skill or experience] is a strong match for what they need. The role is [one-line description of what makes it compelling]. Would you be open to a quick call to hear more? No pressure if the timing is off.
Template 6: Passive candidate InMail
Subject: Not looking? Still worth 5 minutes
Hey [first name], I know you are probably not actively looking — most of the people I reach out to are not. But I am placing for a [role] at [company type] that is genuinely different from most: [specific differentiator]. If the timing is ever right, I'd rather you know me now than when you are already in three interview processes.
SaaS Founder Templates
Template 7: Integration angle
Subject: [Product] + [their tool]
Hey [first name], noticed [company] is using [tool they use, found via tech stack data]. We integrate directly with [tool] and add [specific capability] without replacing what they already have set up. Teams using both typically see [specific outcome]. Worth a 15-minute demo to see if the integration fits your stack?
Template 8: Competitor switch trigger
Subject: Switching from [competitor]?
Hey [first name], saw [company] was using [competitor]. We work with a lot of teams making the switch from [competitor] to [your product] — the migration is usually faster than people expect, and the main reason they move is [specific pain point]. Happy to walk through how it works on a quick call if that is something you are evaluating.
How to Automate InMail Without Getting Flagged
LinkedIn does not prohibit InMail automation explicitly, but it flags accounts that send InMails at volumes inconsistent with organic user behavior. The practical limit is 5 to 15 InMails per day per account, depending on account age and connection density. Above that threshold, accounts show increased restriction rates.
The right automation approach for InMail is not bulk-sending templates. It is using automation to identify the non-acceptors from your connection request campaigns, pull their profile context for personalization, generate the first-line observation, and send at a safe daily volume. The InMail becomes the fallback touch in a sequence where connection request acceptance was the preferred entry point.
ACA handles this through its native LinkedIn integration via Unipile. Sequence steps can be configured as "send InMail if connection not accepted after X days," with per-account daily limits enforced automatically. All InMail replies land in the unified inbox alongside replies from email and WhatsApp, so a prospect who replies to an InMail will not receive an email follow-up the next morning. For how InMail fits into a full multi-channel sequence, the multi-channel sequence playbook covers the full orchestration.
The strategic framing for why InMail + email + LinkedIn connection works better than InMail alone is in the LinkedIn outreach strategy guide.
FAQ
How many InMail credits do LinkedIn Premium and Sales Navigator give you?
LinkedIn Premium Business gives 15 InMail credits per month. LinkedIn Sales Navigator gives 50 per month. Credits roll over up to 3 months on Premium and up to 3 months on Sales Navigator. Paid InMail add-ons are available but rarely cost-effective at scale; most teams doing volume InMail outreach use the organic sequence approach (connection request first, InMail to non-acceptors) to stretch credit usage.
Do free InMails (Open Profile InMails) work differently?
Yes. LinkedIn members with Open Profile turned on can receive InMails for free from any LinkedIn user. These do not consume credits. Open Profile members tend to be more active on LinkedIn and more receptive to outreach, which is why targeting Open Profile users specifically can improve InMail reply rates. Sales Navigator lets you filter for Open Profile leads explicitly.
What is the difference between InMail and a direct message?
Direct messages go to existing connections only. InMail reaches anyone on LinkedIn regardless of connection status, using credits. When you send an InMail to someone who is already a connection, it sends as a direct message and does not consume a credit. This means once a prospect accepts a connection request, you can message them directly for free, which is one reason the connection-request-first approach is preferred over leading with InMail.
Should I use the same template for all eight InMail slots per month?
No. InMail credits are limited, so each one should be reserved for a high-value prospect where the template is genuinely personalized to their specific context. A single template sent to eight prospects produces lower results than eight individually customized messages where only the structure is shared. At scale, use automation to generate the personalized first line per prospect from enrichment data, then apply the shared structural template.
What response rate should I expect from a good InMail?
LinkedIn's published benchmark for InMail response rates is around 10 to 25 percent, with wide variance by industry, role seniority, and message quality. Personalized InMails under 100 words with specific openers perform toward the high end. Generic templates at any length perform toward the low end or below. The figure of 22 percent higher response for short InMails comes from LinkedIn's own benchmark data comparing message length brackets, not a specific study design.