THE FUTURE MARKETACADEMY
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School of Marketing

Email Strategy: deliverability and testing

What you'll be able to do
  • Explain how an email gets from your tool to an inbox, and what makes it land in spam instead.
  • Set up and check SPF, DKIM and DMARC for your sending domain.
  • Keep a healthy list: handle bounces and complaints, remove people who never engage and send at a steady pace.
  • Make unsubscribing easy and understand why that protects your delivery.
  • Design fair subject-line and offer tests and read the results with care.
  • Work out revenue per email and judge programmes by money and list health together, not by opens.
  • Build a monitoring routine and hand in a graded project you can show.

This course is education only. It is not legal advice. For rules in your country, use the boxes and official pages in the Sources.

Words in this course 46Open the Vocabulary Hall
01

How email reaches the inbox

In simple words

A letter can be perfect and still get lost if the post office does not trust your return address. Inbox providers are post offices. They look at who you are, how people treat your mail and whether you follow their rules.

Before this course: Email Campaigns: automations and segments (course 3.5.2). You already have a consented list, segments, welcome and follow-up automations, and the basics from Email Marketing & Building a List (course 3.5). Here you make sure your messages arrive and you learn to test and measure them like a professional.

Key facts
  • Delivered means the receiving server accepted the email. Inbox placement means it went to the main inbox, not spam or a promotions tab. A message can be delivered and still land in spam, so "delivered" is not the same as "seen."
  • Inbox providers decide with signals: whether your email is authenticated (lesson 2), your reputation (how people have treated your mail before) and your content and links.
  • Reputation is built from behaviour: low spam complaints, few bounces, people who open, click and reply, and steady sending.
  • Gmail and Yahoo published stricter sender rules in 2024 that many other providers follow in spirit. Google's guidelines say that all senders must set up SPF or DKIM, use TLS, have valid DNS records and keep the spam rate in Postmaster Tools below 0.3%. Google also recommends staying below 0.10%.
  • Bulk senders (Google: more than 5,000 messages a day to Gmail accounts) must also use SPF, DKIM and DMARC and support one-click unsubscribe for marketing messages.
  • Yahoo's published rules are similar: authentication, a spam rate below 0.3%, and for bulk senders one-click unsubscribe, a visible unsubscribe link and honouring unsubscribes within 2 days.
  • Rules and numbers change, so check the provider pages on the day you plan your programme.
IdeaSimple meaning
AuthenticationProof the email really comes from you
ReputationHow receivers remember your past mail
EngagementDo people want it (clicks, replies, not deleting unread)
ComplaintsPeople pressing "report spam"
Step by step
  1. Write down the domain you send from (for example mail.yourbusiness.com).
  2. Find your daily sending volume. Is it near 5,000 messages a day to any one provider? (Most small senders are not.)
  3. Open Google's sender guidelines page (link in Sources) and note the all-senders rules.
  4. Open Yahoo's sender best-practices page and note the differences.
  5. Write a one-page "where we stand" list with a tick or cross for: SPF or DKIM, TLS, unsubscribe, spam rate known.
  6. Circle the crosses. They are your work list for lessons 2 to 4.
  7. Check: you can explain in two sentences the difference between "delivered" and "in the inbox."
Watch on YouTube
Mastering email marketing: SPF, DKIM, DMARC explainedOmnisend · YouTube · youtube.com

Videos by other creators on YouTube, for reference. They are not made by or affiliated with The Future Market.

LESSON 01How email reaches the inbox
LESSON 01 / ANIMATED LESSON / AI VOICE00:00 / 01:10
Read the video script
[Host] "Delivered is not the same as read. Delivered just means the server said okay."
[Screen: inbox, spam folder and promotions tab] "Your email can land in any of three places."
[Text on screen: Authentication. Reputation. Engagement. Complaints.] "Providers judge you on proof, past behaviour, engagement and complaints."
[Text on screen: Spam rate under 0.3%] "Google and Yahoo say keep spam complaints below zero point three percent."
[Host] "Earn trust first. Then test."
Try it now

Write a "where we stand" checklist for your sending setup using the Google and Yahoo pages. Mark what is done, what is missing and what you do not know yet.

ClaudeStuck? Copy a ready-made prompt for Claude

Copy this, open Claude, paste it, and Claude will walk you through the lesson step by step.

For a grown-up: Claude is for adults (18+). Copy this, paste it into Claude, and use the answer to explain the lesson to your child.

I'm learning "Email Strategy: deliverability and testing" on The Future Market. Lesson 1: "How email reaches the inbox".

What the lesson teaches:
- Delivered means the receiving server accepted the email. Inbox placement means it went to the main inbox, not spam or a promotions tab. A message can be delivered and still land in spam, so "delivered" is not the same as "seen."
- Inbox providers decide with signals: whether your email is authenticated (lesson 2), your reputation (how people have treated your mail before) and your content and links.
- Reputation is built from behaviour: low spam complaints, few bounces, people who open, click and reply, and steady sending.
- Gmail and Yahoo published stricter sender rules in 2024 that many other providers follow in spirit. Google's guidelines say that all senders must set up SPF or DKIM, use TLS, have valid DNS records and keep the spam rate in Postmaster Tools below 0.3%. Google also recommends staying below 0.10%.
- Bulk senders (Google: more than 5,000 messages a day to Gmail accounts) must also use SPF, DKIM and DMARC and support one-click unsubscribe for marketing messages.
- Yahoo's published rules are similar: authentication, a spam rate below 0.3%, and for bulk senders one-click unsubscribe, a visible unsubscribe link and honouring unsubscribes within 2 days.
- Rules and numbers change, so check the provider pages on the day you plan your programme.

The exercise I'm working on:
Write a "where we stand" checklist for your sending setup using the Google and Yahoo pages. Mark what is done, what is missing and what you do not know yet.

I'm stuck. Please:
1. Explain the main idea in plain, simple words with one everyday example.
2. Walk me through the exercise one small step at a time. Ask me what I've done so far before giving the next step.
3. Don't just give me the final answer. Help me do it myself, and check my work when I share it.
I'm a parent helping my child (about 8 years old) with a lesson called "How email reaches the inbox" from the course "Email Strategy: deliverability and testing".

Here's what the lesson says:
A letter can be perfect and still get lost if the post office does not trust your return address. Inbox providers are post offices. They look at who you are, how people treat your mail and whether you follow their rules.

The activity:
Write a "where we stand" checklist for your sending setup using the Google and Yahoo pages. Mark what is done, what is missing and what you do not know yet.

Please explain this so an 8-year-old understands: short sentences, a fun everyday example, and no hard words.
Then give me 3 simple questions I can ask my child to check they understood, and a way to do the activity together, one tiny step at a time.
Open Claude
Sources
My notes
02

Authenticate your domain: SPF, DKIM, DMARC

This lesson is part of full access: every course and every level for one payment.

03

List health: bounces, complaints and quiet subscribers

This lesson is part of full access: every course and every level for one payment.

04

Easy unsubscribes, clear consent and clean content

This lesson is part of full access: every course and every level for one payment.

05

Test subject lines and offers properly

This lesson is part of full access: every course and every level for one payment.

06

Revenue per email and what it really tells you

This lesson is part of full access: every course and every level for one payment.

07

Monitor, respond and run the programme

This lesson is part of full access: every course and every level for one payment.

++

Final project

This lesson is part of full access: every course and every level for one payment.

??

Quiz

  1. What is the difference between "delivered" and "in the inbox"?

  2. What do Gmail and Yahoo ask senders to keep the spam complaint rate below?

  3. What does SPF do?

  4. What does DKIM do?

  5. What does DMARC tell receivers?

  6. What DMARC policy is a safe place to start?

  7. What is a hard bounce and what should you do?

  8. Why are open rates unreliable?

  9. Why does an easy unsubscribe help delivery?

  10. Which metrics are better winners for a subject-line test?

  11. What is a holdout group for?

  12. How do you calculate revenue per email?

  13. Why should you check unsubscribes and complaints next to revenue?

  14. If complaints suddenly rise, what is the first step?

EX

Final exam

This lesson is part of full access: every course and every level for one payment.

CE

Certificate

This lesson is part of full access: every course and every level for one payment.