The Email Deliverability Checklist for 2026
Authentication, list hygiene and sending habits that keep your emails out of spam — a checklist you can work through in an afternoon.
Choosing an email platform feels simple until you are three years in, paying five times what you expected, and stuck with automations you can't migrate. This guide gives you a short framework to make the right call the first time.
1. Start with your business model, not the feature list
Every email tool claims automation, templates and analytics. The real differences show up when you match a platform to how you make money:
- E-commerce store — you need purchase data, abandoned-cart flows and product recommendations. Look at Klaviyo first.
- Creator or course seller — tagging, simple funnels and selling digital products matter most. Look at Kit or beehiiv.
- B2B or service business — lead scoring, CRM and conditional automations pay off. Look at ActiveCampaign.
- Small business newsletter — a clean editor and a low price win. Look at MailerLite or Brevo.
2. Understand how pricing scales
Most platforms charge by contacts stored. A few, like Brevo, charge by emails sent. The difference is huge once your list grows:
- If you have a large list but email only a few times a month, send-based pricing is usually cheaper.
- If you email a small, engaged list very often, contact-based pricing can be fine.
Before you sign up, price each shortlisted tool at three list sizes: today, 12 months from now, and your two-year goal. The cheapest tool today is often not the cheapest at 25,000 contacts.
3. Check deliverability tools, not deliverability promises
No vendor can guarantee inbox placement — that depends mostly on your sending habits. What a good platform can do is make best practice easy:
- Guided setup of SPF, DKIM and DMARC on your own domain
- One-click unsubscribe headers
- Bounce and complaint handling, plus clear reporting
Read our email deliverability checklist for the full list.
4. Test the automation builder with a real workflow
Sign up for a trial and build one real automation, for example a five-email welcome sequence that branches when someone clicks a link. You will learn more in 30 minutes than from any comparison table:
- Is the builder visual and easy to follow?
- Can you branch on behaviour (opens, clicks, purchases, tags)?
- Can you see where subscribers are inside the flow?
5. Think about migration before you commit
Moving platforms is painful: automations rarely export, and you may need to re-warm your sending reputation. Pick a tool you can grow with for at least two to three years.
Our quick recommendations
- Best value: Brevo
- Best automation: ActiveCampaign
- Best on a budget: MailerLite
- Best for creators: Kit
- Best for e-commerce: Klaviyo
See the full ranking in Best Email Marketing Software, or compare two head to head, like Mailchimp vs Brevo.