Fardeen KarimA cold email strategy is the set of decisions that come before any email is written: who you email, what you offer them, how you send, and how you judge and improve the results. I've run cold email for six years and around 12 million emails, and in 2026 the strategy that works is quieter and more careful than the one people still copy from old guides.
The short version: a narrow audience you can describe in one sentence, an offer they'd want even from a stranger, separate warmed-up sending domains at about 30 emails per mailbox a day, short plain emails with three follow-ups, and replies (not opens) as the measure.
What changed, and why old playbooks fail
- Authentication is required. Since 2024, Gmail and Yahoo require SPF, DKIM and DMARC from bulk senders and enforce a spam complaint limit; Microsoft followed for Outlook.com in 2025.
- Volume per mailbox is down. Sending hundreds a day from one mailbox no longer works; many mailboxes at a modest pace does.
- Opens are unreliable. Apple Mail Privacy Protection and image blocking make open rates close to meaningless.
- Generic AI emails are everywhere. Buyers recognise them, so relevance and a real reason to write matter more than ever.
1. Audience: who exactly
Write your ideal customer profile in two sentences: the kind of company, size, place, the role that says yes, and the problem you solve. Narrow beats broad every time: a tight niche list was one of the three reasons my best campaign worked.
Then look for signals of need: hiring for a role you support, new funding, a launch, a new leader. A company with a trigger event is worth ten without one.
2. Offer: why they'd reply
The offer is what you're asking them to say yes to first, and it decides more replies than the wording. In order of strength:
- A result with a guarantee, when you can keep it.
- A small, specific piece of free work: an audit, three ideas, a short video about their site.
- A short conversation with a clear, useful agenda.
- A generic demo, the weakest.
If the right people don't want the offer, no amount of copywriting fixes it. When campaigns of mine have failed, a weak offer was one of the three causes, alongside bad lists and landing in spam.
3. Infrastructure: how you send
| Decision | What I do |
|---|---|
| Domains | Separate sending domains, never the main one |
| Mailboxes | Real Google Workspace mailboxes, 3 per domain |
| Daily volume | About 30 cold emails per mailbox |
| Warm-up | About 14 days before campaigns, kept running after |
| Authentication | SPF, DKIM, DMARC and MX on every domain |
| Tracking | Off, or on a custom tracking domain |
The deliverability playbook covers each in depth.
4. List: the right people, verified
Build the list from your profile, verify it right before sending, remove customers and anyone who opted out, and keep bounces under 2%. A bad list is the most common reason I see campaigns fail, and the one that burns domains fastest.
5. Sequence: one email and three follow-ups
My sequence: the main email, then follow-ups after 3, 5 and 7 days, all in the same thread, each shorter than the last and each adding something new. Stop the moment anyone replies. See cold email copywriting for how to write each step.
6. Measurement: replies, not opens
| Number | What to aim for |
|---|---|
| Bounce rate | Under 2% |
| Reply rate | Around 1 to 3% on a good campaign, in my experience |
| Positive replies | The share of replies that are interested: the number that pays |
| Meetings and cost per meeting | What decides where to add volume |
Judge a campaign after the whole sequence has run, two to three weeks after launch.
7. Improvement: one change at a time
When results are weak, change one thing, in this order: the list, then the offer, then the first line and the question. Run small wording variations to keep emails from being identical, and proper A/B tests for real differences.
8. Channels and compliance
Email is the core: it scales and replies are easy to track. LinkedIn and calls work well alongside it (multichannel outreach). Follow the law where your prospects are: the CAN-SPAM Act in the US, PECR and GDPR in the UK and EU, CASL in Canada. Make opting out easy everywhere.
A 90-day plan
- Days 1 to 30: profile, offer, domains and mailboxes, warm-up, first list, first sequence, launch small. The 30-day plan has the detail.
- Days 31 to 60: judge the first campaign, fix the list or offer, launch a second segment.
- Days 61 to 90: add mailboxes ahead of volume, keep the winning segment running, test a new offer.
Questions people ask
Does cold email still work in 2026?
Yes, for senders who do the basics properly. It's harder for anyone sending generic emails at high volume from one domain, which is most of the noise buyers complain about.
How many emails should I send a day?
About 30 per mailbox. Your total is that times the number of warmed mailboxes you have.
mailzy runs this whole strategy in one account: mailboxes and warm-up, lead lists and verification, campaigns with follow-ups, every reply in one inbox, and deals on a board. See Outreach.