What My Spam Folder Taught Me About Effective Email Marketing

Santhosh Guru

Product @ ZEPIC
January 6, 2025
Introduction:

As a product manager in MarTech for the past 10 years, I've developed an unusual habit: I regularly check my Gmail spam folder. While this might sound odd & tedious, it's given me unique insights into the evolving battle between email marketers and spam filters. Here's what I've learned about making email marketing work in today's landscape.

Source

The Enduring Power of Email:

Email is one of the most important inventions of the 20th century, next to the Internet. Think about how your life and work are intertwined with it. The whims and fancies of a big corporation do not own it. It cannot be that easily blocked by a corporation or government. It is a democratic tool available to everyone. Email remains one of the most powerful tools in digital communication. Consider these facts:

  • Email marketing generates $36 for every $1 spent (DMA, 2023) (link)
  • 4 billion people use email daily (link)
  • Unlike social media platforms, email gives you direct ownership of your audience relationships.
  • It's platform-independent and globally accessible.

These numbers demonstrate why effective email marketing remains a cornerstone of digital communication strategies. With recent changes from major email providers like Google and Yahoo, understanding what makes email marketing effective has become more critical than ever. Let's dive into what makes emails reach their intended destination.

The Evolution of Email Marketing:

I have seen marketers come full circle when it comes to email.  I've watched marketing trends come and go:

  • 2016: Snapchat was supposed to kill email
  • 2019: Slack and team messaging tools were the 'email killers'
  • 2022: TikTok was predicted to replace traditional marketing channels
  • 2024: Email continues to thrive, with newsletter platforms like Substack growing exponentially

The reason? Email combines unmatched ROI with remarkable openness and flexibility. While some companies chase trendy platforms, others, like Warby Parker (link), have built billion-dollar businesses on the backbone of effective email marketing (along with other channels too).

Open to all, delivered to a few—Email’s core challenge:

Openness, flexibility, and affordability are the key characteristics of email as a channel. But that is a double-edged sword. Genuine people who want to connect with their audience rely on it, while spammy marketers or scammy salespeople also depend on it. Today's email scams have evolved far beyond our comprehension. Modern threats include:

  • Sophisticated phishing attempts mimicking major brands
  • AI-generated personalized scam emails
  • Business Email Compromise (BEC) attacks
  • Cryptocurrency investment scams

This environment makes it crucial for legitimate marketers to stand out.

Key Principles for Effective Email Marketing:

The key challenge as an email marketer is to wade through these complexities to acquire customers and engage with them. Here are a few key things that I have learned to make email an effective channel:

  1. Respect the inbox - Think of email like the living room of your subscriber's digital home:some text
    • Segment your emails by purpose (promotional, transactional, newsletters)
    • Use preview text effectively to set expectations
    • Maintain consistent sending schedules
    • Make it easy for your subscribers to opt out or unsubscribe
  2. Email deliverability hygiene checklist - Technical foundation matters more than clever subject lines::
    • SPF (Sender Policy Framework): Authenticates your sending domain
    • DKIM (DomainKeys Identified Mail): Ensures email hasn't been tampered with
    • DMARC (Domain-based Message Authentication): Protects against spoofing
    • Regular list cleaning: Remove hard bounces and inactive subscribers
    • Maintain a suppression list for unsubscribes
  3. Avoid Spam Triggers - Modern spam filters are sophisticated but still watch for:
    • Excessive punctuation (!!!) or ALL CAPS
    • Trigger words like 'free,' 'guarantee,' 'no risk'
    • Large attachments in marketing emails
    • Image-only emails without text
    • Mismatched sender domains
  1. Keep the main thing, the main thing - For effective email marketing, focus on metrics that truly matter instead of obsessing over vanity metrics:
    • Track revenue per email
    • Measure customer lifetime value by email engagement
    • Monitor unsubscribe reasons
    • Test different conversion goals (downloads, purchases, registrations)
    • Use attribution modelling to understand email's role in the customer journey 
Conclusion: 

Email marketing succeeds when you combine technical excellence with genuine value for your subscribers. Focus on building trust, maintaining a clean sending reputation, and delivering relevant content. The tools and tactics may evolve, but these principles remain constant. You can also simply choose ZEPIC, where we have crafted the product considering all these principles so that you can focus on the key business challenges.

Desperate times call for desperate Google/Chat GPT searches, right? "Best Shopify apps for sales." "How to increase online sales fast." "AI tools for ecommerce growth."

Been there. Done that. Installed way too many apps.


But here's what nobody tells you while you're doom-scrolling through Shopify app reviews at 2 AM—that magical online sales-boosting app you're searching for? It doesn't exist. Because if it did, Jeff Bezos would've bought (or built!) it yesterday, and we (fellow eCommerce store owners) would all be retired in Bali by now.


Growing a Shopify store and increasing online sales isn’t easy—we get it. While everyone’s out chasing the next “revolutionary” tool/trend (looking at you, DeepSeek), the real revenue drivers are probably hiding in plain sight—right there inside your customer data.
After working with Shopify stores like yours (shoutout to Cybele, who recovered almost 25% of their abandoned carts with WhatsApp automation), we’ve cracked the code on what actually moves the needle.


Ready to stop app-hopping and start actually growing your sales by using what you already have? Here are four fixes that will get you there!

Fix #1: Convert abandoned carts instantly (Like, actually instantly)

The Painful Truth: You're probably losing about 70% of your potential sales to cart abandonment. That's not just a statistic—it's real money walking out of your digital door. And looking for yet another Shopify app for abandoned cart recovery isn't going to fix it if you're not getting the fundamentals right.

The Quick Fix: Everyone knows you need multi-channel recovery that hits the sweet spot between "Hey, did you forget something?" and "PLEASE COME BACK!" But here's the reality—most recovery apps are a one-trick pony. They either do email OR WhatsApp, not both. And don't even get us started on personalizing offers based on cart value—that usually means toggling between three different dashboards while praying your apps talk to each other.

Enter ZEPIC: This is where we come in. With ZEPIC's automated Flows, you can:
Launch WhatsApp recovery messages (with 95% open rates!)
Set up perfectly timed email sequences (or vice versa)
Create personalized recovery offers not just on cart value but based on your customer’s behavior/preferences
Track and optimize everything from one dashboard

Fix #2: Reactivate past customers today

The Painful Truth: You're probably losing about 70% of your potential sales to cart abandonment. That's not just a statistic—it's real money walking out of your digital door. And looking for yet another Shopify app for abandoned cart recovery isn't going to fix it if you're not getting the fundamentals right.

The Quick Fix: Everyone knows you need multi-channel recovery that hits the sweet spot between "Hey, did you forget something?" and "PLEASE COME BACK!" But here's the reality—most recovery apps are a one-trick pony. They either do email OR WhatsApp, not both. And don't even get us started on personalizing offers based on cart value—that usually means toggling between three different dashboards while praying your apps talk to each other.

Enter ZEPIC: This is where we come in. With ZEPIC's automated Flows, you can:
Launch WhatsApp recovery messages (with 95% open rates!)
Set up perfectly timed email sequences (or vice versa)
Create personalized recovery offers not just on cart value but based on your customer’s behavior/preferences
Track and optimize everything from one dashboard

Offering light at the end of the tunnel is Google’s Privacy Sandbox which seeks to ‘create a thriving web ecosystem that is respectful of users and private by default’. Like the name suggests, your Chrome browser will take the role of a ‘privacy sandbox’ that holds all your data (visits, interests, actions etc) disclosing these to other websites and platforms only with your explicit permission. If not yet, we recommend testing your websites, audience relevance and advertising attribution with Chrome’s trial of the Privacy Sandbox.

Top 3 impacts of the third-party cookie phase-out

Who’s impacted

How

What next

Digital advertising and
acquisition teams
Lack of cookie data results in drastic fall in website traffic and conversion rate
Review all cookie-based audience acquisition. Sign up for Chrome’s trial of the Privacy Sandbox
Digital Customer Experience
Customers are not served relevant, personalised experiences: on the web, over social channels and communication media
Multiply efforts to collect first-party customer data. Implement a Customer Data Platform
Security, Privacy and Compliance teams
Increased scrutiny from regulators and questions from customers about data storage and usage
Review current cookie and communication consent management, ensure to align with latest privacy regulations