Email Marketing Back to Basics: 14 Essential Do’s and Don’ts Straight From Experts

How many marketing emails do you actually open and what makes the ones you do open stand out?

The best brand newsletters, news, or product update emails might look seamless and light, but those are the ones with the most effort and knowledge behind them.

Success in email marketing requires a delicate balance of strategy, creativity, and adherence to best practices.

To help you navigate this landscape effectively, let’s delve into some crucial do’s and don’ts of email marketing.

And hey, you might even get a chuckle or two from your readers.

Golden Do’s of Email Marketing

If you’re starting off, here are the main things you should keep in mind.

1. Segment Your Audience

Segmentation allows you to tailor your email content to different audience subsets, increasing relevance and engagement.

Dive into your subscriber list based on demographics, past purchase behavior, or engagement level, and you’ll be able to craft targeted messages that speak directly to people’s interests and needs.

“Segment your audience to tailor your messaging to their preferences.”
— Namecheap Guru Guides

Here’s how that applies in real life: A furniture retailer implemented segmented triggered sends: welcome emails, cart abandonment and post‑purchase series. It grew open rates by over 300% compared with non‑segmented blasts, demonstrating the power of targeted email flows to drive engagement – shows one case study by Marketing Sherpa.

2. Craft Exciting Subject Lines

Subject lines will always be your email campaign’s make-it-or-break-it. Truth is, you may spend endless hours strategizing and creating copy and it can all be for nothing.

The subject line is your first opportunity to grab the attention of your subscribers and entice them to open your email.

Aim for subject lines that are clear, concise, and intriguing. Incorporate elements like personalization, urgency, or curiosity to pique interest and encourage opens.

“Sixty-four percent of subscribers will open an email based on the subject line.”
— Neil Patel, Digital Marketing Expert & Co-Founder, NP Digital

Here’s how that applies in real life: In A/B testing scenarios, subtle differences in subject line wording  such as reframing a statement as a question, have been shown to increase open rates significantly, demonstrating how small changes to headlines can meaningfully impact engagement. – Mailer Lite

3. Provide Value

This is a no-brainer: Every email you send should offer something of value to your subscribers.

It’s not about what you want or need to promote, it’s about how the information given in your email benefits people.

Whether it’s helpful tips, exclusive discounts, or entertaining content, make sure your emails address pain points or interests and provide a reason for your audience to engage with your brand.

“Permission marketing is the privilege (not the right) of delivering anticipated, personal and relevant messages.”
— Seth Godin, Author & Marketing Thought Leader, Akimbo

Here’s how that applies in real life: Vitrazza redesigned its welcome email series with personalized messaging and saw email sales increase by 55%, click‑through rates climb by 20%, and open rates reach over 30–50%, proving value‑focused messaging significantly boosts performance. – Selzy

4. Optimize for Mobile

We live in a mobile-first world, and most e-mails are also being read on the phone.

Can people see your subject line? Does the email layout look ok? Is the copy readable?

With each email you design, one of your foremost priorities should be how everything will be displayed correctly on phones and tablets, so create responsive emails that work well on all devices.

Try sending a few test emails before each campaign and check them on several screen sizes.

“Mobile use impacts email experience and readability; optimizing for mobile layouts improves performance.”
— Email Tool Tester

Here’s how that applies in real life: In many mobile design case studies, brands that shifted to single‑column responsive layouts and larger CTAs reported higher click‑through rates and lower bounce/exit behavior — supporting the idea that mobile optimization isn’t optional, it’s essential. – Mailer Lite

5. A/B Test

A/B testing, also known as split testing, involves sending variations of your email to different segments of your audience to determine which performs better.

Experiment with different subject lines, email copy, images, CTAs, and send times to identify what resonates best with your subscribers and drives the highest engagement.

“Testing reveals what resonates best and helps refine messaging over time.”
— Neil Patel, Digital Marketing Expert & Co-Founder, NP Digital

Here’s how that applies in real life: A/B testing can drive up to an 83% increase in email marketing ROI by systematically optimizing each component of the email experience, from subject lines and send times to content structure and calls-to-action—where the compounded impact of small, data-driven improvements adds up to substantial performance gains. – MailMend

6. Maintain Consistency

Consistency in your email marketing efforts helps to reinforce your brand identity and keep your brand top-of-mind for your subscribers.

Establish a regular sending cadence, whether it’s weekly newsletters, monthly promotions, or automated drip campaigns, and stick to it to maintain a strong presence in your subscribers’ inboxes.

“Consistency in messaging and brand experience enhances audience recognition and trust.”
— LinkedIn Marketing Insights

Here’s how that applies in real life: Industry research shows that brands harboring a regular schedule, such as a weekly digest, generate about 3x more revenue than sporadic senders. – Entrepreneurs HQ

7. Include Clear CTAs

Your emails should always include a clear and compelling call-to-action (CTA) that prompts recipients to take the desired action, whether it’s making a purchase, signing up for an event, or downloading a resource.

Make sure your CTA stands out visually and clearly communicates what you want the recipient to do next.

“Have one clear call to action if you want the maximum result.”
— Justin Nabity, Founder & CEO, Growngs

Here’s how that applies in real life: According to research, button-based CTAs, especially single button CTAs, have improved click-through rates by 127%. – Campaign Monitor

8. Monitor and Analyze Metrics

Tracking key email marketing metrics allows you to evaluate the performance of your campaigns and identify areas for improvement.

Monitor metrics such as open rates, click-through rates, conversion rates, and unsubscribe rates to gauge the effectiveness of your emails and make data-driven decisions to optimize your future campaigns.

“Tracking key performance metrics provides insights for continuous improvement.”
— Number Analytics

Here’s how that applies in real life:  In practice, segmentation has been linked to revenue increases of up to 760%, with segmented campaigns delivering open rates around 14% higher and click-through rates nearly twice as high as non-segmented sends. – Campaign Monitor & Wordstream

Don’ts That Will Push People Away

Sounds easy enough, yet certain mistakes seem to populate the industry. Here are some common ones👇

1. Overwhelm with Frequency

Bombarding your subscribers with too many emails can lead to email fatigue and increase the likelihood of unsubscribes or spam complaints.

Respect your subscribers’ inbox space by carefully considering the frequency of your email sends and focusing on quality over quantity.

“Balancing communication frequency matters — too many messages can overwhelm subscribers.”
— Namecheap Guru Guides

2. Neglect Email Design

Poorly designed emails with cluttered layouts, inconsistent branding, or formatting issues can detract from your message and reflect poorly on your brand.

Invest time and resources in creating visually appealing and professional-looking emails that enhance the user experience and reinforce your brand identity.

“Design for clarity and accessibility, including mobile layouts and clean formatting.”
— Email Tool Tester

3. Misleading Subject Lines

Clickbait or deceptive subject lines that promise one thing but deliver another can erode trust and credibility with your subscribers.

Avoid using misleading tactics to drive opens and instead focus on crafting subject lines that accurately reflect the content of your emails and provide value to the recipient.

“Subject lines should align with email content to meet subscriber expectations.”
— Neil Patel, Digital Marketing Expert & Co-Founder, NP Digital

4. Ignore Legal Compliance

Failure to comply with email marketing laws and regulations can have serious consequences, including fines, legal action, and damage to your brand reputation.

Familiarize yourself with laws such as the CAN-SPAM Act in the United States or the GDPR in Europe, and ensure that your email marketing practices adhere to legal requirements regarding consent, transparency, and data privacy.

“Permission marketing emphasizes consent and respect for people’s inboxes.”
— Seth Godin, Author & Marketing Thought Leader, Akimbo

5. Purchase Email Lists

Buying email lists may seem like a quick way to expand your subscriber base, but it can harm your sender reputation and deliverability rates.

These lists often contain outdated or irrelevant contacts who haven’t opted in to receive communications from your brand, leading to high bounce rates, spam complaints, and potential blacklisting by email service providers.

“Targeting only opted‑in users creates better engagement than sending to purchased lists.”
— Namecheap Guru Guides

6. Send Without Proofreading

Typos, grammatical errors, broken links, or formatting issues can detract from the professionalism of your emails and create a negative impression with your subscribers.

Always thoroughly proofread and test your emails before sending them to ensure accuracy, clarity, and functionality.

“Clarity and focus matter for email effectiveness — unclear content can reduce engagement.”
— Email Tool Tester

7. Disregard Unsubscribes

Honoring unsubscribe requests promptly and respecting your subscribers’ preferences is not only a legal requirement but also essential for maintaining a positive relationship with your audience.

Make it easy for recipients to unsubscribe from your emails, and promptly remove them from your mailing list to avoid further communication and potential complaints.

“Respecting opt‑out and permissions protects inbox health and brand reputation.”
— Seth Godin, Author & Marketing Thought Leader, Akimbo

Email Marketing Tools to Bring It All Together

When picking a tool, consider your audience size, campaign complexity, and business goals.

Smaller teams might prioritize ease of use and affordability, while larger teams may need advanced automation and personalization features.

If you’re thinking about which email marketing platform to pair with your newfound email strategy knowledge, here are three standout options.

• Mailchimp is a classic choice. Its drag-and-drop editor, built-in automation, segmentation, and analytics make it easy for small teams or businesses just starting out to manage campaigns and scale over time.
• ActiveCampaign is great for those who need advanced automation and CRM integration. Its workflow builder and conditional logic let you send highly personalized emails based on subscriber behavior. This makes it perfect for businesses focused on nurturing leads and driving conversions.
• Klaviyo is particularly suited for e-commerce brands. It integrates deeply with platforms like Shopify and WooCommerce, offers detailed segmentation, and automates revenue-focused campaigns like cart recovery and post-purchase flows.

Think about the type of emails you’ll send, how often, and how much you want to tailor them to each subscriber. Choosing the right tool ensures your campaigns are effective, manageable, and engaging.