Email Marketing: Lead Magnets, Automations, Metrics and CAN-SPAM | Free Digital Marketing Course: From Beginner to Expert

What you'll learn

How to grow an email list with a lead magnet and real consent.
What the CAN-SPAM Act requires and how to land in the inbox under Gmail, Yahoo and Outlook rules.
How to write emails that get opened, read and clicked.
The automations that sell the most: welcome, abandoned cart and replenishment.
Which metrics to trust and how to calculate revenue per email.

Email marketing sounds old-fashioned, but it's still one of the most profitable channels a small business has. The reason: your email list is owned media (lesson 1). No algorithm decides who sees your message, it lands in each person's inbox and every send costs almost nothing. Social media gives you reach; email gives you a relationship and repeat sales.

Step 1: build the list

Nobody hands over their email "to receive news and updates." You need a lead magnet: something valuable people get in exchange for their address.

Type	Aurora Coffee example	Service business example
Guide or recipe book	"5 Café Recipes You Can Make at Home Without Fancy Gear" (PDF)	"Checklist: 12 Deductions Freelancers Forget at Tax Time"
Discount	10% off your first order	$25 off the first appointment
Tool or template	Coffee-to-water ratio calculator	Monthly budget spreadsheet
Quiz or assessment	"Which coffee is right for you?" with a personal recommendation	"How healthy is your website?" score
Mini course	"Home Barista in 5 Days" by email	"5 Days to Organize Your Finances"

Place it where your audience already is: a form on your website (inside blog posts, or a pop-up when someone is about to leave), the link in your social bio, the checkout page, the receipt and a QR code at your counter.

Tools

Platforms like Mailchimp, Klaviyo (very popular with online stores), Kit, MailerLite, Brevo or ActiveCampaign manage your list, forms, sends and automations, and most have free or low-cost starter plans. Never send bulk email from your personal Gmail: you won't get stats, you'll land in spam and you can't manage unsubscribes properly.

1. What's the best lead magnet for a Spanish language school?

"Free Spanish level test with your result and a personalized study plan."
"Subscribe to our newsletter."
"Leave your email so we can contact you."

It offers something valuable and immediate in exchange for the email, and the result tells you how to segment each new subscriber.

Step 2: follow the rules (CAN-SPAM)

In the U.S., commercial email is governed by the CAN-SPAM Act, enforced by the FTC. It applies to every commercial message, including business-to-business email. According to the FTC's compliance guide, each violating email can bring a penalty of up to $53,088. Use this checklist before every campaign:

The "From," "To" and "Reply-To" information is accurate and identifies my business.
The subject line honestly reflects the content of the email.
If it's an ad, it's identifiable as one.
It includes a valid physical postal address (a street address, or a P.O. box or private mailbox registered under USPS rules).
It explains clearly how to opt out, and the opt-out works for at least 30 days after sending.
Opt-outs are honored within 10 business days, without fees or extra hoops.
I monitor any agency or platform that sends email on my behalf (I'm still responsible).

Legal minimum vs. best practice

CAN-SPAM doesn't require prior consent for email, but sending to people who never asked for it destroys your deliverability. Only email people who opted in, say what they'll receive and how often, and never buy lists. If you have subscribers in Canada or Europe, their laws require consent up front.

Step 3: land in the inbox

Use your own domain (an address like hello@[yourdomain].com, never a free Gmail or Yahoo address) and set up the authentication your platform asks for: SPF, DKIM and DMARC records.
Know the big inbox providers' rules. Gmail and Yahoo (since 2024) and Microsoft's Outlook.com, Hotmail and Live (enforcing since May 5, 2025) require senders of more than 5,000 messages a day to authenticate with SPF and DKIM, publish a DMARC record and offer one-click unsubscribe. Gmail and Yahoo also want unsubscribes processed within two days.
Keep spam complaints low: Gmail and Yahoo require a complaint rate under 0.3%, and Google recommends staying below 0.1%.
Clean your list: after a win-back attempt, remove people who haven't opened or clicked in 6 to 12 months.
Avoid misleading subject lines, ALL CAPS and stacks of exclamation points.

Step 4: write emails that work

Subject:     Bitter coffee? Here's why (and the 30-second fix)
Preheader:   One change to your grind.

Hi Jess,

Last week you asked why your coffee tastes bitter even though you buy
good beans. Short answer: it's almost always the grind.

French press needs a coarse grind, like sea salt. If it's too fine,
the water over-extracts and you get bitterness.

I made a 1-minute video showing the exact texture:
👉 See the right grind

Want us to ship your coffee pre-ground for your brewer? Just reply
with the name of your coffee maker and I'll tell you which one fits.

Lucy, Aurora Coffee Co.
Aurora Coffee Co. · [street address], Denver, CO · Unsubscribe

Subject line: short, specific, curiosity or a clear benefit. The preheader is the preview text next to it: use it to finish the idea.
A human sender: "Lucy, Aurora Coffee Co." feels closer than "noreply."
One goal per email and one main button or link.
Real personalization: not just the first name, but content based on what they bought or clicked.
Simple, mobile-friendly design: most emails are opened on a phone.

Step 5: segment

Don't send the same thing to everyone. Segment by:

Stage: subscribers who never bought, new customers, repeat customers, lapsed customers.
Interests: the lead magnet they downloaded, the links they click.
Purchase behavior: what they bought, when, and how much they spend.

Step 6: automations that sell while you sleep

Automation	Trigger	Typical sequence
Welcome	Someone subscribes	See the timeline below
Abandoned cart	Adds products and doesn't pay	1 hour later: "Forget something?" · 24 hours: answer doubts (shipping, returns) · 48–72 hours: optional incentive
Post-purchase	First order	Thank you + how to use the product · Review request after 7 days
Replenishment	Expected time to use up the product	Day 25: "Running low on coffee?" with a one-click reorder link
Win-back	No purchase in 90 days	"We miss you" + something new · If no response, ask if they want to stay on the list

Day 0Deliver the lead magnetSend the brew guide right away and introduce Aurora in three lines.
Day 2Useful content"The grind mistake that makes coffee bitter," with a link to the blog guide.
Day 4Social proofA real customer story, shared with permission, plus two short reviews.
Day 6First-order offerFree shipping on the starter bundle for 72 hours, with a real deadline.

2. A customer bought a 12-ounce bag of coffee that usually lasts about three weeks. Which automation makes the most sense?

A welcome email.
A win-back email six months later.
A replenishment email a few days before they run out, with a one-click reorder link.

The moment they're about to run out is the best time to sell again, with the least effort for the customer.

Step 7: measure

Metric	Formula	What it's for
Open rate	Opens ÷ delivered	Directional only: Apple Mail Privacy Protection pre-loads emails and inflates opens
Click rate	Unique clicks ÷ delivered	Real interest in the content
Conversion rate	Orders ÷ unique clicks	Whether the offer and the landing page convince
Revenue per email	Attributed revenue ÷ emails delivered	Compares campaigns and automations fairly
Unsubscribe and complaint rates	Unsubscribes or complaints ÷ delivered	Whether you're sending too often or off-target

Example: Aurora sends a campaign to 2,000 subscribers. It gets 140 unique clicks (7%) and 21 orders (15% of clicks) with a $50 average order. Revenue: 21 × $50 = $1,050, or about $0.53 per email delivered. The next week it sends a cold brew offer only to the 500 subscribers who clicked on iced-coffee content: 55 clicks (11%), 8 orders and $400 in revenue, which is $0.80 per email. Segmenting earned about 50% more per email with a quarter of the sends.

Revenue per email delivered (scale: $0 to $1.00)

Full list$0.53

Segment$0.80

3. Why shouldn't you judge a campaign by its open rate alone?

Because it's impossible to measure.
Because some email apps inflate it, and what matters are clicks and sales.
Because it's always 100%.

Privacy features like Apple Mail Privacy Protection load emails automatically and record "opens" that never happened. Clicks and revenue are more reliable.

4. A subscriber clicks "unsubscribe." Under CAN-SPAM, how quickly must you honor the request?

Within 30 business days.
Within 10 business days (and Gmail and Yahoo expect bulk senders to do it within two days).
Only if they also send a written letter.

CAN-SPAM sets a 10-business-day limit and forbids charging a fee or adding hoops. In practice, your email platform processes unsubscribes instantly, which also keeps you within the inbox providers' rules.

Practice exercise: your welcome sequence

Define your lead magnet and where you'll offer it.
Write a four-email welcome sequence (subject, preheader, goal and short copy for each).
Define two segments of your list and what you'd send each one.
Calculate revenue per email for your last campaign (or a hypothetical one).

See solution: a sequence for a registered dietitian in San Diego

Lead magnet: "7 Healthy Breakfasts in 5 Minutes" (PDF)

Email 1 (day 0) · Subject: Your 7 breakfasts are here
  Goal: deliver the PDF and introduce herself in three lines.
Email 2 (day 2) · Subject: The breakfast mistake that leaves you starving by 11
  Goal: useful content (protein at breakfast) + link to a blog post.
Email 3 (day 4) · Subject: "I stopped snacking all afternoon" (Carla's story)
  Goal: social proof with a real client story, shared with permission.
Email 4 (day 6) · Subject: Want a plan built for you?
  Goal: offer the first consultation at 20% off for 72 hours.

Segments: (1) people who downloaded the breakfast guide → recipes and
the consultation offer; (2) past clients → monthly check-in tips and
referral invitations.
Revenue per email: 1,200 delivered, 9 consultations at $150 =
$1,350 ÷ 1,200 = $1.13 per email.

Summary

Your email list is an owned asset: grow it with a lead magnet and real opt-in consent.
Follow CAN-SPAM: honest headers and subjects, a postal address, a working opt-out honored within 10 business days.
Authenticate your domain (SPF, DKIM, DMARC), offer one-click unsubscribe and keep complaints under 0.1%.
Segment and automate: welcome, abandoned cart, post-purchase, replenishment and win-back.
Judge emails by clicks, orders and revenue per email; treat open rates as directional only.

Next lesson: Landing Pages and Conversion Rate Optimization (CRO). You'll learn where visitors become leads and customers, and how to raise that percentage.