Email Marketing

Email marketing is the practice of sending planned, useful emails to people who have agreed to receive them, to build trust, guide them to buy, and keep them as customers. It includes newsletters, welcome and onboarding series, offers, and emails triggered by what a person does, all sent to an opt-in list.

• Owned channel: The list belongs to the business itself, not to a social platform that can change its rules.
• Opt-in only: Every address must come from someone who signed up, so never buy or scrape lists.
• Deliverability: SPF, DKIM and DMARC records prove your emails are genuine, so they reach the inbox.
• Automation: Welcome, onboarding and win-back emails can send themselves when a person takes an action.
• Measurable: Clicks, sign-ups, sales and unsubscribes show which emails work and which ones do not.
• AI era: AI drafts subject lines and variants; people check facts, tone and consent.

This lesson follows a SaaS startup in Pune that sells GST billing software to small shops and traders. Visitors sign up for a 14-day trial on the website, and many never create their first invoice. The founders want email to turn more trial users into paying customers.

Why Email Marketing Matters

• It reaches people who asked: Someone who signed up for a trial wants help, and email is where they expect it.
• It carries detail: Setup guides, GST tips and feature explanations fit email better than a short chat message.
• It runs on autopilot: One well-built onboarding series keeps working for every new sign-up without extra effort.
• It supports every stage: From welcome to renewal, it is a core channel in lifecycle marketing.
• It is low cost per send: Most tools charge by list size or volume, so each extra email costs little.

Step-by-Step Email Marketing Framework

Step 1: Set One Goal per Program

Each email program needs one measurable goal. For the startup, the onboarding series aims to get trial users to create their first invoice, the newsletter aims to bring past trial users back, and renewal emails aim to keep paying customers.

Step 2: Build an Opt-In List

• Trial sign-up: Account emails are part of the service; marketing emails need a separate, unticked checkbox.
• Lead magnet: A downloadable GST invoice format in exchange for an email address, with clear wording about what else they will receive.
• Double opt-in: A confirmation email before the first newsletter keeps typos and fake addresses out.

Keep a record of when and how each person signed up, and never import bought, scraped or borrowed lists; India's DPDP Act expects clear consent and an easy way to withdraw it.

Step 3: Set Up Deliverability

Before the first campaign, set up authentication on the domain the emails come from. Many businesses send marketing email from a subdomain, such as mail.example.in, to protect the main domain.

example.in              TXT  "v=spf1 include:_spf.youremailtool.com ~all"
selector1._domainkey    TXT  "v=DKIM1; k=rsa; p=(public key from your email tool)"
_dmarc.example.in       TXT  "v=DMARC1; p=none; rua=mailto:dmarc@example.in"

• SPF: Lists the servers that are allowed to send email on behalf of your domain.
• DKIM: Adds a signature that proves the email was not changed on the way.
• DMARC: Tells mailbox providers what to do when checks fail, and sends you reports. Start with p=none, then move to quarantine once all your senders pass.
• One-click unsubscribe: Marketing emails should carry a List-Unsubscribe header that lets people leave in one click, plus a visible link in the footer.

Gmail and Yahoo set rules for bulk senders, who must authenticate with SPF and DKIM, publish DMARC, offer one-click unsubscribe and honour it quickly, and keep spam complaints very low. Google Postmaster Tools shows how Gmail sees your domain's reputation and spam complaint rate.

Step 4: Segment the List

Start with simple groups such as trial users who have not created an invoice, trial users who have, paying customers, and past trials that ended. Segments let each group get the email that fits where they are.

Step 5: Plan the Email Types

Step 6: Write Each Email

• Subject line: Say what is inside, in under 50 characters where possible.
• Preview text: Add the next useful line of the message, not the words "View in browser".
• One goal: Use one main button with a clear action, such as "Create your first invoice".
• Mobile first: Short paragraphs and a large button, since many shop owners read on phones.
• Tracked links: Add UTM parameters so visits and sign-ups show in analytics.

Step 7: Test and Measure

Test one thing at a time, such as two subject lines, using A/B testing. Judge emails by clicks, trial activations, paid upgrades, unsubscribes and spam complaints. Open rates are unreliable because some mail apps load emails automatically, even when no one reads them.

Step 8: Clean the List

Stop mailing people who have not clicked or opened in a long time, after one last re-engagement email, because a smaller, active list reaches the inbox more often than a large, silent one.

Template or Checklist

Welcome series plan for the trial:

Before each send, check:

• SPF, DKIM and DMARC pass for the sending domain.
• Every recipient opted in, and unsubscribes are removed.
• The unsubscribe link and one-click header work.
• Links carry UTM tags and open the right pages.
• The email reads well on a phone.

Example: Trial to Paid for a Pune SaaS Startup

• Segment: Trial users who signed up but have not created an invoice by day 2.
• Email: Subject "Your first GST invoice takes 3 steps", a 60-second video link, and one button.
• Branch: Users who create an invoice skip ahead to the "add your products" email; others get a reminder with a short guide.
• Sales help: Users who open the pricing page twice are flagged in the CRM for a call.
• Measure: The team compares activation and paid conversion for trial users who received the new series with those from before, and reads unsubscribe and complaint counts.
• Next: Once the series works, the team adds personalised product tips, covered in AI personalization in email marketing.

Mistakes to Avoid

• Buying lists: It breaks consent rules and quickly damages the sending domain's reputation with mailbox providers.
• Skipping authentication: Without SPF, DKIM and DMARC records in place, mail often lands in the spam folder or is rejected outright.
• Hiding the unsubscribe link: People who cannot find it mark the email as spam instead, which hurts deliverability far more.
• Chasing opens: Open rates are unreliable, so measure clicks, sign-ups and sales instead.
• Same email to everyone: A paying customer does not need trial reminders, and a new user does not need renewal offers.
• Sending from a no-reply address: Replies are useful signals for mailbox providers and often contain real customer questions.

How AI Changes Email Marketing

What AI Automates Now

Email tools now draft subject lines and body copy, suggest send times, predict which contacts are likely to buy or leave, and build segments from plain-language requests. General AI assistants can also review a whole series and point out gaps in it.

What Still Needs a Human

Deciding what the product promises, the offer, and the voice of the brand. Someone must check every fact, especially GST rules and pricing, and decide who should not get an email.

Risk to Watch

AI drafts can state wrong tax rules or invent features. Pasting a customer list into a public AI tool can also expose personal data. Share only anonymised or summary data, and review every email before it goes out.

Do It with AI

Use this prompt to draft an onboarding series. It works in ChatGPT, Claude or Gemini.

1. Write down the key action and the reasons users get stuck, from support tickets and calls.
2. Run the prompt and cut any email that does not move users towards the key action.
3. Rewrite the drafts in your own voice and add real screenshots or a short video.
4. Build the series in your email tool, test it on your own inbox, then turn it on for new sign-ups.

Check Before You Use It

• Facts: Every feature, price and tax rule must match the product and current law.
• Brand fit: The emails should sound like the team talking to a shop owner, not like a template.
• Compliance: Send marketing emails only to people who opted in, and keep one-click unsubscribe working.