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Email Deliverability Best Practices Now

  • by Jake Lee
  • 21 min read
Email Deliverability Best Practices Now

Email deliverability can feel like a maze. You craft great emails, yet they land in spam folders. It’s frustrating, I know. But you can take charge of your sending reputation. It all comes down to following the best steps to make sure your emails reach the inbox every single time. The rules keep shifting, but good email practices stand strong. You need to learn and adapt. This guide will walk you through the key ideas that you should follow to achieve high email delivery rates.

What is Email Deliverability?

Email deliverability is about whether your emails make it to the inbox. Not just “sent,” but successfully in front of the user’s eyes. It’s not about whether an email bounces back. Or if it is labeled as spam. It’s about your message ending up where it should. In a way, you can think of it like this. The post office is the email server, and the mailman is the email deliverability specialist. Your job is to ensure that the mailman carries your mail all the way to its designated address without getting stopped along the way.

Think of it as a journey, from your “send” button to the reader’s inbox. Many things can stop an email. Spam filters, server issues, or poor sender practices. Good email deliverability means your emails reach their goal. Poor deliverability means lost chances. You are losing on potential clients, engagement, and conversions. In short, when you invest in email deliverability, you are investing in your business.

Why Email Deliverability Matters

Deliverability is key to the success of your email campaigns. If emails don’t reach the inbox, you might as well not even send them. There are a few reasons why a good email deliverability strategy is important.

  • Higher Engagement: When emails get to the inbox, more people will read them. That drives higher click-through rates. It means better results from your marketing efforts.
  • Better ROI: Improved deliverability means a better return on investment (ROI). Every email sent has a cost, whether it is in time or money. If your emails do not reach their goal, you are losing money with every email you send.
  • Stronger Sender Reputation: ISPs (Internet Service Providers) watch how you handle your email campaigns. Good practices lead to a solid sender reputation. Bad practices lead to your emails being labeled as spam. A good reputation helps boost deliverability over time.
  • More Accurate Data: Deliverability data provides a true picture of how your emails perform. Bounces and spam reports let you see what’s working and what needs to change.
  • Trust from Customers: When subscribers get your messages reliably, they are more likely to trust you. Trust is key for long-term relationships. This is true whether you are selling products or services, or simply keeping in touch with your audience.
  • Avoid Being Blacklisted: Poor deliverability can cause ISPs to blacklist your email server or IP address. This is very hard to recover from, and it will kill your business.
  • Keeps Email Lists Clean: Improving deliverability requires you to remove bad email addresses. Keeping your lists clean helps boost your deliverability in the long run.

Key Email Deliverability Factors

Many things affect where your emails end up. Here are some key factors to consider.

Sender Reputation

Your sender reputation is like your credit score for email. ISPs use this to decide if your emails are good to deliver. A high score means better chances of reaching the inbox. A low score means your emails might end up in the junk folder. You need to make sure you protect and build this score over time.

Some key things can impact your reputation:

  • Sending Volume: How often you send emails matters. Sending too many emails too fast can look suspicious. Start slow and raise your sending volume gradually over time.
  • Email Engagement: How your users interact with your emails. Do they open and click? Or delete without reading? Good interaction boosts your score, and bad interaction lowers it.
  • Spam Complaints: Complaints are a big hit to your reputation. These happen when users mark your emails as spam. Keep this rate low by sending emails that people want to read.
  • Bounce Rate: High bounce rates also lower your reputation. This means your email list needs to be very clean.
  • Domain and IP Reputation: Each has its own score. Your domain is the website used in your email address. Your IP is the server used for sending. You must keep both scores clean.

Authentication

Authentication shows ISPs that you are who you claim to be. It helps you prove that the emails you send are really from you. There are a few ways you can achieve email authentication.

  • SPF (Sender Policy Framework): SPF records show which servers are allowed to send emails for your domain. This tells ISPs that an email sent from one of your addresses is legitimate. This is a must have for email deliverability.
  • DKIM (DomainKeys Identified Mail): DKIM adds a digital signature to your emails. This signature verifies that the email has not been changed in transit. If the signature is correct, the email will be delivered to the inbox.
  • DMARC (Domain-based Message Authentication, Reporting, and Conformance): DMARC builds upon SPF and DKIM. It tells ISPs what to do if an email fails the checks. You can tell ISPs to reject, quarantine, or deliver the email as normal. It also provides reports to show how your email domain is being used.

Content

The words and images you use matter to email filters. Spam filters look at your content to decide if it’s a scam or not. You must make sure that your content is free of spam traps.

Here are a few things you should consider:

  • Avoid Spam Trigger Words: Words like “free,” “money,” or “guarantee” are known to trigger spam filters. Do not use these words unless they are absolutely necessary for the email.
  • Image-to-Text Ratio: Too many images and not enough text can also look suspicious. Make sure there is a good balance.
  • Use Plain Text: Make sure to include a plain-text version of your email. Some email clients and users prefer this option.
  • Personalization: Emails that are personalized are more likely to engage your users. Use their names and past purchase data.
  • Clear Unsubscribe Link: It is important to have an easy-to-find unsubscribe link. This is required by law in many countries. This will help lower spam complaints.

List Management

How you collect, store, and use your email lists is vital to your deliverability. Poor management can damage your reputation. Good practices lead to long-term success.

Here are a few things you should consider:

  • Double Opt-in: Use double opt-in to confirm your subscribers want to be on your list. Double opt-in means that they first subscribe, and they get a confirmation email that they have to click to be added to the list. This lowers the chance of spam complaints.
  • Clean Your Lists: Remove inactive users, and bounced email addresses regularly. You can use third-party tools to help you clean your email lists regularly.
  • Segment Your List: Do not send all your emails to your entire list. Split your list into groups that receive different types of emails. This makes your email lists more engaged.
  • Avoid Bought Lists: Purchased lists are full of bad data. These lists do not care about your email and will mark them as spam.
  • Make It Easy to Unsubscribe: Make it easy for users to leave your email lists.

Infrastructure

The technical parts of your email setup also affect deliverability. This includes your sending server, network, and software.

Here are a few things you should consider:

  • Dedicated IP: Use a dedicated IP address for sending emails. This helps you build a reputation separate from other users. This is key when you are sending a lot of emails on a daily basis.
  • Email Service Provider (ESP): A good ESP has good deliverability practices. They provide authentication, list management, and reporting features.
  • Monitor Your Server: Regularly check your servers for issues. Look for blacklists and spam traps.

Engagement

User engagement is a key factor for email deliverability. ISPs look at how your subscribers engage with your emails. High engagement is a sign that your emails are valued. Low engagement signals spam or low-quality content.

Here are a few things you should consider:

  • Open Rates: High open rates show that your subscribers are interested in your content. This signals to ISPs that you are not spamming.
  • Click-Through Rates (CTR): A high CTR means that people are not only opening your emails, but they are also taking action.
  • Replies and Forwards: If you are trying to get replies and forwards, this also shows your subscribers care about your emails.
  • Low Unsubscribes: Low unsubscribe rates mean your subscribers like the content you send. You do not want to send emails to users who are not engaged.

Email Deliverability Best Practices

Now you know what factors affect your email deliverability. Here are the best practices you need to use.

Set Up Email Authentication

Start by setting up SPF, DKIM, and DMARC for your domain. If you don’t set up email authentication, you are sending email to your user’s spam folder. Make sure that all three are working. This is the first step to improve email deliverability. These methods verify that emails come from your business and prevent them from being labeled as spam. These can be a bit complex to set up, and you might need the help of a web developer.

  1. Generate the required records: SPF, DKIM, and DMARC records are text-based DNS entries that you need to create on your DNS provider.
  2. Add the SPF Record: An SPF record should list all the email servers that you use to send emails.
  3. Add the DKIM Record: A DKIM record adds a digital signature to your emails.
  4. Add the DMARC Record: The DMARC record builds on the previous records and shows what to do with the emails that do not pass these checks.
  5. Test and Validate: Use online tools to validate that the records are set up correctly.

Clean Your Email List Regularly

Keep your email list clean to boost deliverability. Bounce rates and spam complaints hurt your sender reputation. Take time to clean your lists, and your numbers will improve.

  1. Remove Hard Bounces: Hard bounces are emails that do not exist anymore. Remove these from your list immediately.
  2. Remove Inactive Subscribers: Identify and remove subscribers who have not engaged with your emails for a long period of time.
  3. Use Double Opt-In: Verify that users have agreed to receive emails. This will reduce bounce rates and spam complaints.
  4. Use a List Cleaning Tool: Many tools are available to automate cleaning email lists. Use one to help keep your lists in good shape.
  5. Segment Your Email Lists: Sending targeted emails to specific groups helps avoid sending the wrong email to the wrong person. This also boosts engagement.

Craft Engaging Content

Your content should provide value to your readers. Interesting and useful emails are more likely to be opened and clicked. Focus on writing high-quality content that keeps the user engaged. Use simple and easy-to-read language. Do not make your content too long.

  1. Personalize Emails: Use the reader’s name and preferences to send more targeted content.
  2. Write Clear Subject Lines: Use short and clear subject lines that entice the user to open the email.
  3. Use a Good Image-to-Text Ratio: Use a good mix of text and images in your emails.
  4. Include a Clear Call to Action: Tell the user exactly what you want them to do with your email.
  5. Use Plain Text: Include plain-text versions of your emails for clients that do not show HTML properly.

Monitor Your Sender Reputation

Keep an eye on your sender reputation. Many tools allow you to check your score and look for any issues that may come up. When you catch a problem early, it is easy to fix. Do not wait for the damage to be done before taking action.

  1. Use Postmaster Tools: Email providers offer postmaster tools to track your sender reputation.
  2. Use Third-Party Tools: Third-party tools provide a more detailed analysis of your sender reputation.
  3. Track Key Metrics: Open rates, click-through rates, bounce rates, and spam complaints all give you an idea of your email deliverability.
  4. Set Up Alerts: Set up alerts to get notified of any significant changes in your deliverability.
  5. Adjust as Needed: Use the information you collect to make changes to your email campaigns.

Follow Sending Best Practices

Sending emails correctly is key to deliverability. Some practices are known to lower your sender reputation, you must avoid them. You must make sure you follow a well planned email strategy that boosts your scores.

  1. Start Slowly: If you are new to email marketing, start slow and send emails to a small part of your list.
  2. Warm Up Your IP: If you are using a dedicated IP, you must warm it up by gradually sending emails.
  3. Avoid Spam Trigger Words: Be careful of the words that you include in your emails.
  4. Test Your Emails: Before you send an email to your entire list, send a test email to multiple providers and clients.
  5. Avoid Large Attachments: Large attachments can cause emails to be blocked, always include links to downloadable files.

Provide an Easy Unsubscribe Process

Making it easy to unsubscribe is key to a good email deliverability strategy. If you make it too hard to unsubscribe, they will simply mark it as spam. You must have an easy way for them to opt out of your email list.

  1. Include a Clear Unsubscribe Link: Always include an easy-to-find unsubscribe link on your emails.
  2. Honor Unsubscribe Requests: Remove subscribers who have opted out from your list immediately.
  3. Use a One-Click Unsubscribe Option: Make it easy for users to unsubscribe in a single click.
  4. Do Not Hide the Link: Make sure the unsubscribe link is easy to spot in your emails.
  5. Do Not Sell Unsubscribe List: If you use a third party for your email list, make sure they do not sell your unsubscribe list to others.

Choose a Reliable Email Service Provider

Your ESP affects your deliverability rates. Choose a provider that has good infrastructure and deliverability tools. A good ESP will provide you with all the information that you need to make sure that your emails land in the inbox.

  1. Check Their Reputation: Make sure they have a good reputation and they follow the rules.
  2. Review Their Deliverability Features: Check what features they offer to help with your deliverability.
  3. Check Their Customer Support: See if their customer support is good enough to help if you ever run into problems.
  4. Ask for Case Studies: Ask for case studies to see how they have helped other businesses with their email deliverability.
  5. Check Their Reviews: Check reviews online to see what other people have to say about them.

Test and Monitor Your Results

Email marketing is not a set it and forget it. You must test your emails and monitor their performance regularly. Use this data to adjust your strategy and improve your email deliverability over time. There are many tools that can help you test your email deliverability before sending it to all of your users.

  1. Use Split Testing: Test subject lines, content, and calls to action to see what performs best.
  2. Use Inbox Placement Testing Tools: These tools tell you where your emails are going (inbox, spam, or promotions).
  3. Monitor Email Performance: Keep track of open rates, click-through rates, bounce rates, and spam complaints.
  4. Adjust Your Strategy: Always adjust your strategy based on the data you are getting.
  5. Keep Testing: Always keep testing your emails, as email providers are constantly changing their algorithms.

Avoid Spam Traps

Spam traps are email addresses set up to catch spammers. They are not used by real people, so if you send an email to one, it’s a red flag to ISPs. You must make sure to avoid these at all costs to keep your sender reputation.

  1. Avoid Purchased Lists: Do not buy email lists. These are usually filled with spam traps.
  2. Use Double Opt-In: Confirm that your users want to receive your emails.
  3. Clean Your Email List: Regularly remove inactive users, as these can sometimes turn into spam traps.
  4. Use a List Hygiene Service: Use an email list hygiene service that finds and removes bad email addresses.
  5. Monitor Your Bounce Rates: High bounce rates can be a sign that you are sending to spam traps.

Use a Consistent Sending Schedule

Consistency helps build your sender reputation. Avoid sending all your emails at once, but instead, keep a regular schedule for email delivery. This also helps the users know when they can expect to receive emails from you.

  1. Create a Sending Schedule: Create a regular schedule for your email campaigns.
  2. Do Not Send Too Many Emails at Once: Space out the sending of your emails to avoid looking like a spammer.
  3. Warm Up Your IP: If you are new to email marketing, gradually increase your sending volume to build a positive reputation.
  4. Track Engagement Over Time: Track how users engage with your emails over time.
  5. Adjust Sending Frequency as Needed: Based on the feedback that you receive, adjust your sending frequency for best results.

Tools to Help with Email Deliverability

Many great tools are available to help with email deliverability. Here are some key ones to use:

Email Authentication Tools

  • MXToolBox: This provides tools to check SPF, DKIM, and DMARC records. It also gives a comprehensive analysis of your domain and email configuration.
  • DMARC Analyzer: This helps you set up and monitor DMARC records. It offers reporting, and insight into your email authentication.
  • Mail-tester: This provides reports that check how your email appears in spam filters. It analyzes your SPF, DKIM, and other deliverability issues.

Email List Cleaning Tools

  • ZeroBounce: This tool validates email addresses and removes spam traps. It also removes invalid or inactive emails from your lists.
  • NeverBounce: This service cleans your email list and improves deliverability by finding invalid emails.
  • Mailfloss: This tool helps you manage email lists and removes bad data from them. It provides bounce and spam tracking.

Sender Reputation Monitoring Tools

  • Sender Score: This tool helps you check your IP address’s sender reputation. It rates your score and tracks your score over time.
  • Google Postmaster Tools: Google’s free tool provides data about your domain’s deliverability on Gmail.
  • Microsoft SNDS (Smart Network Data Services): This Microsoft service provides data about your IP’s deliverability on Outlook.

Email Testing Tools

  • Litmus: This tool allows you to test your emails on many clients and devices. It also checks your content for spam issues and reports them.
  • Email on Acid: This service lets you test emails on different email clients. It provides spam filtering checks to make sure your emails are compliant.
  • Mailtrap: A safe email testing tool that catches issues before sending to real users. This allows you to test and debug emails.

Email Marketing Platforms (ESPs)

  • Mailchimp: This provides deliverability insights and helps you follow all the best practices. It is one of the oldest and most reliable platforms in the world.
  • Constant Contact: This platform offers tools for list management and deliverability monitoring. It is very useful if you are looking for ease of use.
  • Sendinblue: This platform helps with email automation and deliverability optimization. It is one of the most cost-effective email platforms in the market.

Common Email Deliverability Mistakes

There are a lot of moving parts to an email marketing campaign. It is easy to make mistakes and damage your reputation. Here are some common mistakes that you must avoid:

Not Using Email Authentication

Not setting up SPF, DKIM, and DMARC is a major mistake. This makes it easy for email providers to flag your emails as spam. Authentication is key to making sure that you are legit.

Buying Email Lists

Purchased lists are full of bad email addresses. This will result in high bounce rates and spam complaints. Do not take shortcuts, and work hard to get your own organic email list.

Sending Emails to Inactive Users

Sending emails to inactive users will lower your sender reputation. These users are not engaged, and are not likely to open or click on your emails. They will probably mark them as spam, which will hurt your scores.

Ignoring Spam Complaints

Spam complaints are a major sign that there is a problem with your email strategy. Ignoring these will hurt your reputation. Make sure that you have a process to review and improve your email marketing based on spam complaints.

Using Spam Trigger Words

Spam filters are triggered by common phrases and words. Avoid words and phrases that are known to trigger spam filters. A list of these words is easy to find with a quick internet search.

Sending Too Many Emails

Sending too many emails can overwhelm your subscribers. This will result in lower engagement, and higher spam complaints. Make sure to send emails only when you have a clear message for the users.

Ignoring Unsubscribe Requests

Do not ignore unsubscribe requests. Make it easy for users to unsubscribe. If you make it too hard, they will mark your emails as spam, and that will hurt your scores.

Not Using Double Opt-In

Use a double opt-in process to make sure that only real users are added to your email lists. This helps prevent spam signups and improves your sender score. This is a simple yet effective method to avoid spam complaints.

Not Testing Emails Before Sending

Always test your emails before sending them to the entire list. This helps catch any errors that can hurt your sender reputation. Use a tool like Litmus to test your emails.

Neglecting Your Sender Reputation

Always monitor your sender reputation. Do not ignore any issues that may come up. When you catch problems early, they are easy to fix. If you wait, they are harder to fix.

The Future of Email Deliverability

Email is not going away any time soon, but the rules are always changing. As technologies improve, new challenges and opportunities will appear. So it is important to stay on top of the best email deliverability practices.

AI and Machine Learning

Artificial intelligence (AI) and machine learning are becoming more important for email deliverability. AI is being used to filter spam, improve personalization, and boost user experience. You must also use AI to create better email campaigns.

Enhanced Personalization

Email marketing is becoming more personalized. With more data, you will be able to send emails that better match the interests of the user. This makes your emails more likely to get opened and clicked.

Increased Privacy Regulations

Privacy regulations like GDPR and CCPA are becoming more important around the world. This makes it important to get clear consent from the users, before sending them marketing material. Users must be given more control over their data.

More Strict Filtering

Email providers are always improving their filters. This means that email deliverability will become more difficult. You must make sure you follow all the best practices to avoid your emails being flagged as spam.

Focus on User Engagement

User engagement will continue to be a key factor for deliverability. Email that is not opened, read, or clicked will be more likely to be flagged as spam. You must make sure you focus on content that is helpful, and engaging.

Need for Better Infrastructure

Email marketing is getting more and more complex. That means a need for better and more reliable infrastructure. Your infrastructure must be able to deal with the demands of the modern internet.

Delivering Emails to the Inbox

Email deliverability is complex, but it is doable. By following the best practices that are listed here, and by constantly monitoring your email campaigns, you will be able to reach the inbox. If you pay close attention, you will be able to improve your email deliverability numbers. When you send emails that users want to read, it makes your email marketing much more effective. Always focus on delivering helpful content, while also avoiding actions that will hurt your sender reputation. This is an ongoing process, and the rules keep changing. But by paying close attention, you will be able to get the results you want. If you follow these steps, your emails will be read, clicked, and engaged with.

Jake Lee

Jake Lee

Jake Lee is Inboxify's Deliverability & Automation Specialist, ensuring our clients' emails reach the inbox every time. He's a certified expert in email authentication protocols and deliverability best practices, with a proven track record of improving sender reputations and maximizing email ROI.

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