Digital marketing is a crucial aspect of modern business, and email marketing stands out as one of the most effective strategies.
Many businesses have cut back on email marketing, assuming it’s no longer effective. But that’s not true. There are many studies done, indicating that email marketing is one of the best ROI giving marketing methods.
According to OptinMonster, the number of email users worldwide is projected to reach 4.6 billion by the end of 2025, making it one of the most widely used communication platforms.
The global email marketing market is projected to grow from $6.5 billion in 2023 to $32.82 billion by 2035, at a CAGR of 16.48%, according to Roots Analysis.
Using email marketing, you can create an outreach from mere messages to a robust sales-generating machine using an effective Email Marketing campaign.
In this comprehensive email marketing guide, I will share with you data-driven insights, case studies, and expert opinions.
What is Email Marketing?
Email Marketing is a marketing method that uses emails to send marketing messages to a group of recipients. It is a channel through which businesses can directly approach customers and promote products. Businesses can share updates, and build relationships with them.
Using email marketing, you can build quality relationships with your audiences by delivering personalized and valuable content directly to your customers’ inboxes.
History of Email Marketing
Email Marketing was first done by Gary Thuer in the year 1978. He was a marketing manager at Digital Equipment Corporation. He sent the first mass email to 400 potential clients, and many of them made purchases, resulting in a massive $13 million in sales.
This Event marked the beginning of the email as a powerful marketing tool. Over the decades, email marketing has evolved into using many advanced technologies and strategies to increase sales.
Types of Email Marketing
Understanding the various forms of email marketing is important for creating effective and well-reached campaigns. Here are the types of email marketing:
Promotional Emails
Promotional emails are emails that aim at promoting products or services. They often feature special offers, discounts, or exclusive deals to entice recipients to make purchases or take action that they want.
Amazon has its recommendation engine, which recommends business improvement, and one of the most recommended things on Amazon is emails. Email significantly increases their sales, and you can also benefit from it. By analyzing user behavior and purchase history, Amazon sends tailored product suggestions, leading to higher conversion rates.
Transactional Emails
Transactional Emails are triggered by specific actions taken by the users, like purchasing, confirming, shipping notification, or password reset. They provide essential information to your customers and usually have higher open rates due to their relevance.
Why Email Marketing?
Email Marketing offers you numerous benefits that are indispensable for business. Here’s how email marketing helps you in business-
- High ROI: For every $1 spent, email marketing can generate an average ROI of $42.
- Wide Outreach: With over 4.6 billion email users worldwide, the potential audience is vast, and your outreach campaign would have a high user base.
- Preferred Communication Channel: According to Virfice, 72% of consumers prefer email as their primary communication channel.
- Customer Retention: According to data from Emarsys, 80% of businesses rely on email marketing for customer retention as it is cheap as well as effective.
Email Marketing Best Practices
You can only harness the full potential of email marketing if you follow the best practices, which are as follows-
Build a Quality Email List
Email marketing begins with growing your email lists. You can build your email lists by encouraging website visitors and customers to subscribe to your newsletter. Do not purchase the email lists as they often lead to low engagement and your potential customers turning you away.
Keep track of bounced emails, and remove dead email accounts.
Personalize Your Content
Emails with personalized subject lines are 50% more likely to be opened.
Personalized emails go above and beyond marketing. It helps you build a long-term relationship with your clients.
You can tailor the content based on user behavior, preferences, and past interactions. You can personalize your content by placing dynamic subject lines and body content. Also, you should differentiate your customers by understanding the user’s behavior to find the best email for them.
Optimize for Mobile
Do you know that mobile devices are the primary devices used by customers to open emails? Around 61% of emails are opened using a mobile device. You have to ensure that your emails are mobile-friendly. You can do that by using templates that adjust according to the screen size and keeping the content of the email concise and engaging.
Implement Automation
Using automation, you can streamline your campaign to ensure you deliver the emails on time and that they get relevant communications. Whenever a new customer subscribes, they should get a series of onboarding emails.
You can also set behavioral triggers like sending an email if they abandon their cart/. Automation streamlines your campaigns, ensuring timely and relevant communication.
Send at the Best Time
According to digital marketer Neil Patel, the best days for blasting email campaigns are Tuesday, Wednesday, and Thursday. The best time is between 9 am and 12 pm.
That means If you send emails these three days between 9 am and 12 pm, your email will perform best.
Use Brand Email
60% of consumers prefer to be contacted by brands through email. Always use company’s identity, including its logo, color scheme, tone, and messaging style, and keep it consistent.
Test and Analyze
You should regularly test your email campaigns using different elements and identifying what resonates best with your audiences. You can track open rates, click-through rates, and conversion rates to gauge performance.
How to Measure the Success of an Email Marketing Campaign
Tracking your performance is the most important part of any marketing campaign. In email marketing, you can track your campaign success if you consider a few KPIs in the campaign, which are as follows-
- Open Rate– The open rate is the percentage of people who open your emails. The industry standard is 22.7%, and you can compare your percentage with this to find out how well your campaign performed.
- Click-through rate (CTR)– The rate at which the actionable CTA links are clicked by your recipients of the email. The industry average is 2.6%.
- Conversion Rate: As the name suggests, it is the rate at which the recipients become your customers, i.e., they purchase something from you.
- Bounce Rate– Bounce Rate is the percentage of emails that are delivered but did not get opened by the Recipients.
- Unsubscribe Rate– Tracks the number of recipients opting out of your mailing list.
Advantages and Disadvantages of Email Marketing
Understanding the pros and cons of email marketing would aid you in leveraging its strengths and mitigating the challenges. So here are the advantages and disadvantages of email marketing-
Advantages
- Email marketing is a cost-effective way to market your business, as it garners an average ROI of $42 for every $1 spent.
- You can send targeted messages to your customers as it allows for segmentation and personalization.
- You can have clear metrics to assess performance.
Disadvantages
- Email may land in the spam folder if not properly managed
- Recipients may feel overwhelmed if you bombard them with frequent emails
- You have to ensure there is a consistent rendering across various email clients, which can be challenging
Legal Compliance in Email Marketing
To make sure your email marketing campaign is successful consistently, you have to adhere to the legal standards. You have to protect your brand and build trust with audiences.
- When you collect emails from your clients, make sure you are also collecting consent from them so that you can send them promotional emails as well
- At the bottom of every email, you should provide an option to unsubscribe
- You should be familiar with laws such as GDPR, the CAN-SPAM Act, and other relevant acts from your region
Email Marketing Tips
To enhance your email marketing campaigns, you can use some of the following actionable tips-
- The subject line is the first thing that someone reads when they see your email in their inbox. Adding a personalized subject line is going to increase the chances of the customers opening the email
- You can use CTAs in your emails to direct your customers on what to do
- You should have your email list vetted so that you do not waste time and effort on the wrong list
- You have to remove inactive subscribers from time to time and ensure that your bounce rate is low
- Ensure that new subscribers confirm their interest, reducing spam complaints and increasing engagement.
Future of Email Marketing
Email marketing is a continuously evolving area of digital marketing driven by advanced technologies. As businesses strive to enhance their customer engagement, they will integrate this technology into their business. You can expect a huge change in Email marketing thanks to AI. Here is what the future of email marketing looks like:
AI-Powered Personalization
AI-driven campaigns help businesses to make personalization more accurate and effective than before. Instead of sending generic mass emails, you can use an AI-driven approach. You can analyze user behavior, preferences, and past interactions to create highly targeted messages. Here are key developments in AI-powered Email marketing-
Predictive Analytics
AI is very good at analyzing the data and predicting a likely output. This feature can be used to project which product is highly liked by a customer. Based on this analysis, you can send promotional emails to get more engagement.
Content Optimization
Using AI recommendations, you can optimize your email content, subject lines, etc. This can increase the open rates and conversion as wel.
Automated A/B Testing
AI can help you in A/B testing your emails by analyzing the user responses and adjusting the email component automatically for better engagement.
Advanced Automation for Smarter Campaigns
With the sophistication of AI, Email automation can ensure that you can make personalized communication with the subscribers. Some of the advanced automation features that AI brings to email marketing are as follows-
Hyper-Personalization:
AI can categorize users based on their behavior. This can allow businesses to send emails that align with customers’s interests and actions.
Smart Send Times
An AI algorithm determines the most effective time to send emails, ensuring maximum visibility and higher open rates
Chatbots and Email Integration
Using AI-powered chatbots and virtual assistants, your response to customer inquiries can improve the user experience and engagement
Interactive and AMP Emails
The traditional emails, which are static and boring, will be replaced by highly interactive and dynamic email experiences. Emails are evolving rapidly into interactive mini-web experiences. Here are some of the Key Features of Interactive Emails:
- Email can display real-time updates and data such as product availability, live countdown, etc.
- Users will be able to fill out feedback forms, register events, or complete transactions directly within the email itself
- Clickable carousels, image slides, and spin to win games will create a more engaging user experience, increasing user interaction and click-through rates
Increased Focus on Privacy and Compliance
With growing concern over data privacy and security, businesses must adapt to the growing security needs. You have to adapt your email marketing strategies to comply with stricter regulations such as GDPR, CCPA, and upcoming global data protection laws.
Case Study
Unlike other marketing channels that deliver quick results, email marketing takes time but it’s an exciting process. You launch a campaign and wait patiently.
We continuously experiment with our clients’ email campaigns, refining strategies to maximize engagement.
With years of experience, our team never stop testing and improving.
We manage email campaigns through Constant Contact for a mortgage broker in Canada. In October 2024, after the Bank of Canada announced a rate cut, we launched an email campaign.
And guess what? It turned out to be our best-performing campaign for them to date!

While the industry average open rate is around 30-40%, we achieved an impressive 65%.
FAQs
The ideal frequency of your email marketing depends on your audience, but generally, 1-2 emails per week is a good number. Too many emails can lead to a higher unsubscribe rate, while too few emails may reduce the engagement rate.
A good subject line that makes people click on the email would increase your open rates. Also, sending personalized emails, segmenting your audiences, and sending emails at optimal times would increase your email open rates.
Yes, Email Marketing is one of the most successful email marketing campaigns that you can run. With AI advancements and improved personalization, email marketing remains one of the highest ROI Channels.
There are many popular email marketing tools like Mailchimp, HubSpot, Brevo, Constant Contact etc.

I am Sunil Tarwara, a seasoned IT professional with over 13 years of hands-on experience in Website Development and Digital Marketing. With a deep understanding of the challenges faced by businesses, I have been trusted by hundreds of clients to achieve their digital goals. I have Master’s degree in Information Technology.
Apart from websites, I like hill stations.