How to do email outreach: strategy and best practices

Email outreach works when you send a short, relevant message to a narrow list, from a properly set up domain, with one clear ask and a few follow ups that add something new. Instantly's 2026 report puts 58% of replies on the first email and 42% on follow ups, so plan for both. Measure replies per company, not opens.

Most guides to email outreach start with templates. We start with the list, because a sharp message to the wrong people loses to a plain message to the right ones. This guide walks through seven steps, from choosing who to write to through to reading the results, and says where the evidence is strong and where it is only advice.

Step 1: who exactly are you writing to?

Write one sentence: "I write to [role] at [type of company] who [has this problem or trigger]." If you cannot say it in one sentence, the list is too wide. A narrow list lets the message be specific, and a specific message is the one that gets read.

The Green Shield Logistics case study is a clear example. The company sells collection and destruction of medical and pharmaceutical waste in Bulgaria. Named heads of quality, ESG, procurement and logistics replied at 8.2%, almost four times the 2.2% of clinic and laboratory inboxes. Same company, same service, different list, and the list decided the result. Read the case study, and see how to build a list in our ICP template.

Step 2: set up the sending side first

Before writing a word, set up the domain. At minimum: SPF, DKIM and DMARC records, a way to unsubscribe, a low starting volume and a plan for bounces. Our post on the minimum cold email setup explains each one in order. Instantly's 2026 report adds two practical rules: keep bounce rates below 2%, and do not concentrate all your volume on a single domain.

Two habits protect you. Start with 5 to 10 emails a day on a new mailbox and raise gradually over four to six weeks, which is what Instantly recommends. And clean the list before sending, because a bounce rate that jumps is the fastest way to damage a sending reputation. In Sellinger, email defaults to 50 sends a day per mailbox, with an optional warm up that starts at 5 a day and doubles every three days up to the limit.

Step 3: write one short message with one ask

The first email has four jobs: say who you are, say why this person, say what you offer in a sentence, and ask one question. Gong reports that reply rates fall sharply above 100 words and that the best emails sit between 50 and 100. Instantly says its top campaigns average under 80 words in the first touch. Both are sources about volume of words, not guarantees, and our post on how long a cold email should be explains what each one measured.

Instantly also advises a single, clear call to action, because multiple asks dilute focus. A binary question or a simple request does better than "let me know your thoughts on a call, a demo or a document".

A sample structure:

• Line 1: the reason you chose this person ("I saw your team opened a second warehouse in Plovdiv").
• Line 2: what you do for people in that position, in plain words.
• Line 3: one question that is easy to answer.

No attachments, no images, and no tracking links in a first touch to a cold list.

Step 4: plan the follow ups before you send the first email

Instantly reports that 58% of replies come from step one of a campaign and 42% from follow ups, and calls four to seven touchpoints the sweet spot, spaced three to four days apart. Our own campaign data shows a bigger effect on one audience: the Shelly installer programme drew 3.3% from its first email and 13.6% from the whole sequence, so three in four replies came only because of a follow up.

The rule is that each follow up adds something. A new angle, a relevant fact or a simpler question works. "Just checking in" does not. Audiences differ, and a formal or wary audience tolerates fewer touches than a friendly one, so the right length depends on the relationship. Our post on how many follow ups depends on the relationship gives a way to choose.

Step 5: choose send times and days sensibly

Instantly reports that Tuesday and Wednesday see peak reply rates, with Wednesday highest. Backlinko's much older study of 12 million emails found Wednesday best and Saturday worst, with differences it called small. Take the hint, not a rule: send on weekdays in the recipient's working hours and test the rest. We cover this in the best time and day to send cold emails.

Step 6: respect opt outs and the law

Every email needs an honest way out and a record of who opted out. In the US, CAN-SPAM requires accurate headers, a non deceptive subject line and a working opt out honored within 10 business days. Other places ask for consent. The rules differ enough that you should read our plain English guide to cold email law, then speak to a lawyer for the countries you target. In Sellinger, a contact who replies STOP or unsubscribe goes on the team's suppression list and the platform checks that list before every send on email, LinkedIn and WhatsApp. That supports your process but does not make a campaign lawful.

Step 7: measure replies the honest way

Open rates are unreliable and say little about interest, so do not run a campaign on them. Count three things:

Count companies, not just contacts, when you write to several people at one firm. The Hotel Pirin case study counted 163 replies from 5,499 contacts (3.0%) and traced five companies from a dated letter to a reservation, which shows how different the reply rate and the outcome can be. HR and office managers sent the most replies, but most had no trip to plan right away, and event agencies replied at 17.1% and produced no reservation. Reply rate is a signal, not the goal. See how to count meetings honestly.

What changes when an AI agent does it?

The steps stay the same. What changes is who does the repetitive part. The Sellinger email agent researches each prospect, writes the first message and every follow up, answers the replies and books the meeting on your calendar. A campaign can run in approval mode, where every message waits for a person to approve it. You still own steps 1, 2 and 6: the list, the domain and the rules. The agent is only as good as the list and the instructions you give it, which is why the first twenty threads deserve a read.

A seven point checklist

• [ ] I can describe my list in one sentence.
• [ ] SPF, DKIM, DMARC and an opt out are in place, and volume starts low.
• [ ] The first email is under 100 words with one ask.
• [ ] Follow ups are planned and each adds something new.
• [ ] I send on weekdays in the recipient's working hours.
• [ ] Opt outs are honored and I know the law where I send.
• [ ] I count replied, positive and booked, per company.