Email Marketing Syllabus

What is segmentation, and how does it differ from personalization?

Segmentation divides a list into groups based on shared traits or behavior (location, purchase history, engagement) to send each group relevant content. Personalization tailors content to the individual. Segmentation groups people; personalization customizes for one person.

List three common bases for segmenting an email list.

Demographic (age, location, gender), behavioral (past purchases, email engagement, website activity), lifecycle stage (new lead, active customer, lapsed), and preference/interest-based segmentation.

What is an Email Service Provider (ESP)?

An ESP is a software platform that lets businesses build, send, automate, and track email campaigns at scale, managing list storage, deliverability infrastructure, templates, and analytics. Examples include Mailchimp, Klaviyo, HubSpot, and Constant Contact.

What key factors should you compare when choosing an ESP?

Deliverability rates, pricing and scalability, automation and workflow features, segmentation capabilities, template/editor ease, integrations (CRM, e-commerce), analytics/reporting, list size limits, and compliance/support.

How do dedicated e-commerce ESPs (e.g., Klaviyo) typically differ from general newsletter ESPs (e.g., Mailchimp)?

E-commerce-focused ESPs offer deep store integrations, product-based automation (abandoned cart, browse abandonment), revenue attribution, and behavioral targeting. General ESPs emphasize simple newsletters, ease of use, and broad templates but with lighter e-commerce data features.

What is email automation and what is a 'trigger'?

Email automation is sending emails automatically based on predefined rules rather than manually. A trigger is the event or condition that starts an automated email or workflow (e.g., a signup, a purchase, cart abandonment, a date, or inactivity).

What is a workflow (or automation flow) in an ESP?

A workflow is a mapped sequence of automated emails and logic branches that guides a subscriber through steps based on triggers, conditions (if/then), and delays—for example an onboarding flow that branches depending on whether a user opens the first email.

Define open rate and give its formula.

Open rate is the percentage of delivered emails that were opened. $$\text{Open Rate} = \frac{\text{Unique Opens}}{\text{Emails Delivered}} \times 100\%$$

Define click-through rate (CTR) and give its formula.

CTR is the percentage of delivered emails in which a recipient clicked at least one link. $$\text{CTR} = \frac{\text{Unique Clicks}}{\text{Emails Delivered}} \times 100\%$$

What is click-to-open rate (CTOR) and how is it calculated?

CTOR measures how engaging the content is among those who opened the email. $$\text{CTOR} = \frac{\text{Unique Clicks}}{\text{Unique Opens}} \times 100\%$$

Define email conversion rate and its formula.

Conversion rate is the percentage of recipients who completed the desired action (purchase, signup) after the email. $$\text{Conversion Rate} = \frac{\text{Conversions}}{\text{Emails Delivered}} \times 100\%$$

What is bounce rate, and what is the difference between hard and soft bounces?

Bounce rate is the percentage of emails that could not be delivered: $$\text{Bounce Rate} = \frac{\text{Bounced Emails}}{\text{Emails Sent}} \times 100\%$$. A hard bounce is a permanent failure (invalid/nonexistent address); a soft bounce is a temporary failure (full inbox, server down).

What is the unsubscribe rate and why is it monitored?

Unsubscribe rate is the percentage of recipients who opt out after an email: $$\text{Unsubscribe Rate} = \frac{\text{Unsubscribes}}{\text{Emails Delivered}} \times 100\%$$. It is monitored as a signal of content relevance, sending frequency problems, or list fatigue.

What is list growth rate and how is it computed?

List growth rate measures net subscriber growth over a period. $$\text{Growth Rate} = \frac{(\text{New Subs} - \text{Unsubs \& Complaints})}{\text{Total Subscribers}} \times 100\%$$

What does CAN-SPAM require of commercial email senders (US)?

CAN-SPAM requires: no false/misleading headers or subject lines, identifying the message as an ad where relevant, a valid physical postal address, a clear and working opt-out (unsubscribe) mechanism, and honoring opt-outs promptly (within 10 business days).

What is GDPR's core requirement for email marketing to EU residents?

GDPR requires a lawful basis for processing personal data—typically freely given, specific, informed, and unambiguous consent (opt-in) before emailing—plus the right to access, rectify, and erase data, and the right to withdraw consent easily at any time.

What is Canada's key anti-spam law and how does its consent model differ from CAN-SPAM?

Canada's law is CASL (Canada's Anti-Spam Legislation). Unlike CAN-SPAM's opt-out model, CASL requires express or implied consent (opt-in) before sending commercial electronic messages, plus sender identification and an unsubscribe mechanism.

What three legal elements are almost universally required in a marketing email footer?

1) A clear, functional unsubscribe/opt-out link; 2) the sender's valid physical mailing address; 3) accurate identification of the sender (who the email is from).

What is email deliverability, and how does it differ from delivery rate?

Deliverability is the ability to land emails in the recipient's inbox rather than the spam folder or being blocked. Delivery rate only measures whether the email was accepted by the receiving server (not bounced); an email can be 'delivered' yet still land in spam.

What are SPF, DKIM, and DMARC?

They are email authentication protocols. SPF (Sender Policy Framework) authorizes which servers may send for a domain; DKIM (DomainKeys Identified Mail) adds a cryptographic signature verifying the message wasn't altered; DMARC ties SPF/DKIM to the From domain and tells receivers how to handle failures, protecting against spoofing.

What is sender reputation and what factors influence it?

Sender reputation is a score mailbox providers assign to a sending IP/domain to gauge trustworthiness. It's influenced by spam complaint rates, bounce rates, spam-trap hits, engagement (opens/clicks), sending volume consistency, and authentication setup.

What is a spam trap and why is it dangerous for deliverability?

A spam trap is an email address used by ISPs and blocklist operators to catch senders with poor list hygiene. Hitting one signals you're mailing addresses without proper consent, severely damaging sender reputation and often triggering blocklisting.

Name three practices that improve email deliverability.

Maintain list hygiene (remove invalid/inactive addresses), use double opt-in, authenticate with SPF/DKIM/DMARC, warm up new sending IPs gradually, avoid spam-trigger content, and monitor engagement to prune unengaged subscribers.

What are key ethical considerations in email marketing?

Only emailing people who consented, being transparent about data use and frequency, honoring unsubscribe requests promptly, avoiding deceptive subject lines or fake urgency, protecting subscriber data/privacy, and not over-emailing (respecting subscriber attention).

What is A/B testing (split testing) in email marketing?

A/B testing sends two variants of an email that differ in one element (e.g., subject line) to comparable audience segments to measure which performs better on a chosen metric, so the winning version can inform future sends.

Which email elements are most commonly A/B tested?

Subject line, sender/from name, preheader text, CTA wording/color/placement, email copy and tone, images vs. no images, layout, offer, and send time/day.

Why does an A/B test require statistical significance before declaring a winner?

Statistical significance ensures the observed performance difference is likely due to the changed variable and not random chance. Declaring a winner on too small a sample or too small a difference risks acting on noise and making the wrong decision.

What is behavioral targeting in email marketing?

Behavioral targeting sends emails based on a subscriber's actions—pages browsed, products viewed, past purchases, email clicks, or app activity—delivering highly relevant, timely messages such as browse-abandonment or replenishment reminders.

How does integrating email with other marketing channels create synergy? Give one example.

Integration creates a consistent, reinforcing cross-channel journey. Example: capturing emails via social ads, retargeting email non-openers with social/display ads, or using email to drive traffic to content and SMS to reinforce time-sensitive offers—improving overall reach and conversion.

What common traits characterize successful email campaigns?

Clear single goal and CTA, relevant segmentation/personalization, compelling subject line and value-driven content, mobile-responsive design, good timing/frequency, strong deliverability, and continuous measurement and optimization through testing.