Deliverability

Ultimate Guide to Mastering Cold Email Deliverability in 2024

author image mailead
Paul Chauvin
July 8, 2024
7
min read

Cold Email Deliverability: The 2024 Landscape

As we navigate the ever-evolving digital landscape of 2024, cold emailing remains a cornerstone of B2B outreach. However, with increasingly sophisticated spam filters and heightened recipient awareness, mastering email deliverability has become more crucial than ever. This ultimate guide is your roadmap to ensuring your cold emails not only land in inboxes but also engage your recipients effectively.

In this comprehensive resource, we'll delve into eight cutting-edge strategies that are shaping cold email success in 2024. From leveraging multi-domain approaches to implementing advanced techniques like custom tracking and spintax, we'll equip you with the tools and knowledge to stay ahead of deliverability challenges.

Whether you're a seasoned email marketer looking to refine your approach or a newcomer aiming to launch your first campaign, this guide offers invaluable insights to elevate your cold email game. We'll explore how to build a robust sender reputation, navigate the intricacies of email authentication, and adapt to the latest best practices in a rapidly changing digital environment.

Prepare to transform your cold email strategy and achieve unprecedented deliverability rates. Let's dive into the ultimate guide to mastering cold email deliverability in 2024!

1 - Set up MX, DKIM, SPF, and DMARC records for your domains

Setting up MX, DKIM, SPF, and DMARC records is crucial for cold emailing as they verify your email authenticity and help ensure your messages reach your recipients' inboxes rather than their spam folders. These records tell email service providers that you're a legitimate sender from your domain.

Why These Records Matter

  • MX (Mail Exchange): Directs email to your domain's email server.
  • DKIM (DomainKeys Identified Mail): Adds a digital signature to your emails, verifying that they haven't been altered.
  • SPF (Sender Policy Framework): Specifies which servers are allowed to send emails on behalf of your domain.
  • DMARC (Domain-based Message Authentication, Reporting & Conformance): Provides instructions on how to handle emails that fail DKIM or SPF checks, adding an extra layer of protection.

How to Set Them Up

  1. MX, DKIM, and SPF: If you purchase your domain and inboxes from the same provider, these records are often configured automatically. For example, Google Workspace handles this for you if you buy a Google domain with Google Workspace inboxes.
  2. DMARC: You'll need to set this up manually. Simply search online for "how to set up a DMARC record" along with your domain provider's name, and follow the provided instructions.

Verification

After setting up these records, verify that everything is configured correctly using tools like Mailead or Mailgenius. These tools can help you identify any issues before you start your cold emailing campaigns.

Remember, ensuring your email authentications are correctly set up enhances your credibility and improves your email deliverability rates.

2 - Send from multiple addresses

In the ever-evolving landscape of cold email marketing, maintaining a robust sender reputation is paramount. One of the most effective strategies for scaling your cold email efforts while protecting your primary domain's reputation is the implementation of a multi-domain, multi-inbox approach. This method, often referred to as inbox rotation, offers a layer of protection and flexibility that single-domain strategies simply can't match.

The Power of Domain Diversification

Large, successful companies often employ this tactic to safeguard their primary brand. Take Salesforce, for instance. While Salesforce.com boasts impressive SEO rankings, domain authority, and sender reputation, their cold email strategies likely utilize secondary domains such as "gosalesforce.com" or "trysalesforce.com". This approach allows them to engage in more aggressive outreach without risking their primary domain's reputation.

Key Benefits of Multi-Domain Strategy:

  1. Risk Mitigation: If one domain or inbox is flagged for spam, others remain unaffected.
  2. Scalability: Allows for higher email volume without overloading a single domain.
  3. Testing Opportunities: Enables A/B testing across different domains and messaging styles.

Implementing Your Multi-Domain Strategy

When setting up your multi-domain cold email infrastructure, consider the following best practices:

  1. Domain Selection:
    • Stick to .com domains exclusively.
    • Include your brand name with relevant prefixes or suffixes (e.g., "get[brand].com", "try[brand].com").
    • Avoid characters, numbers, or hyphens in domain names.
    • Purchase domains from reputable providers like Google Domains or GoDaddy.
  2. Domain and Inbox Setup:
    • Aim for 2-3 inboxes per domain and 3-4 domains per admin console or tracking account.
    • Calculate needed inboxes based on a target of 50 emails per inbox per day.
    • Set up 20% more inboxes than the minimum calculated need for flexibility.
  3. Infrastructure:
    • Use Google Workspace or Microsoft 365 for inbox setup. Their emails have the best reputation.
  4. Volume Considerations:
    • If your cold email volume is low (1-5% of total email volume) and you have strong open rates on transactional/marketing emails, you might not need multiple domains.

Calculating Your Needs

To determine the optimal number of domains and inboxes, follow these steps:

  1. Set your daily email target.
  2. Divide by 50 (emails per inbox per day) to get the number of inboxes needed.
  3. Divide the number of inboxes by 2-3 to determine domains required.
  4. Add 20% to both figures for buffer.

Example:Target: 1000 emails/dayInboxes needed: 1000 / 50 = 20Domains needed: 20 / 3 ≈ 7With 20% buffer: 24 inboxes across 8-9 domains

Cost Considerations

While this approach requires investment, it's often more cost-effective than risking your primary domain's reputation. Google Workspace's basic plan, for instance, costs $6 per user per month, making it an accessible option for many businesses.

Implementation Tips

  1. Gradual Ramp-Up: Start with a few domains and slowly increase volume to build domain reputation (see next part).
  2. Content Variation: Slightly alter email content across domains to avoid triggering spam filters.
  3. Consistent Branding: Ensure all domains maintain consistent branding to avoid confusing recipients (eg. make sure to redirect your sub-domains to your main domain).

As you embark on this strategy, continually monitor your results, adapt to feedback, and always prioritize providing value to your recipients. With careful planning and execution, a multi-domain cold email strategy can become a powerful tool in your marketing arsenal, driving growth while protecting your brand's digital reputation.

3 - Implementing an Effective Inbox Warming Strategy

Understanding Inbox Warming: Building Email Reputation for Better Deliverability

Inbox warming is a crucial yet often overlooked step in cold email marketing. This process involves gradually increasing email activity from a new domain to establish credibility before launching full-scale campaigns. The principle is simple: the more time invested in warming your inboxes, the longer they'll remain effective for your outreach efforts.

Why Is Inbox Warming Important?

Picture your new domain as a newcomer in a neighborhood. If you suddenly start throwing large parties every night, your neighbors might become suspicious. Similarly, email receivers view new domains with caution. Abruptly sending high volumes of cold emails can trigger red flags, potentially causing your messages to be filtered as spam.

Utilizing Specialized Warmup Services

To navigate the challenge of inbox warming, consider utilizing specialized warmup services such as Mailead.io or Mailreach.co. These tools methodically send a controlled number of emails daily from your new domains to verified inboxes. This controlled approach helps build a positive sender reputation over time.

Best Practices for Inbox Warming

  1. Duration: Dedicate at least 2-3 weeks to the warming process.
  2. Volume: Begin with 3 warmup emails on day one, then gradually increase by 2-3 emails each subsequent day, capping at 30 emails per day.
  3. Engagement Metrics: Aim for a response rate between 25% and 40% on your warmup emails.

Transitioning from Warming to Live Campaigns

Scaling Up Email Volume

Once your inboxes have been adequately warmed, you can begin to scale up your email volume. However, proceed with caution:

  • Maintain the warmup process
  • Limit your initial cold emails to 10-15 per day
  • Set a 100% response rate for these initial outreach attempts

Distributing Volume for Sustainable Growth

To achieve sustainable growth in your cold email strategy, consider distributing your volume across multiple warmed inboxes and domains (see 1.). This approach allows for safer scaling of your outreach efforts over time.

Quick Start Guide: When Time is of the Essence

In situations where you need to commence campaigns immediately:

  • Start with 10-15 cold emails daily from your inboxes
  • Be prepared for potential flagging
  • Have backup inboxes ready to deploy within weeks

Best Practices for Sending Cold Emails

  • Space emails evenly: Send one cold email every 8-15 minutes per inbox. Don’t blast email. In Mailead you can set up the minimum time between two emails. Never go lower than 5 minutes.
  • Maintain consistent sending patterns across all inboxes

4 - Set Up a Custom Tracking Domain

In the dynamic world of cold email marketing, success hinges on your ability to monitor, analyze, and refine your campaigns continuously. One of the most critical metrics to watch is your open rate, which serves as a key indicator of your emails' deliverability and recipient engagement.

Understanding Open Rates

A healthy open rate for cold emails typically exceeds 35%. This benchmark suggests that your messages are successfully landing in recipients' inboxes rather than being relegated to spam folders. However, it's crucial to approach open rate data with a degree of skepticism, as we'll explore later.

The Mechanics of Email Tracking

Modern email management platforms employ sophisticated tracking techniques to provide insights into recipient behavior. The primary methods include:

  1. Invisible Pixels: These tiny, transparent images are embedded in emails. When an email is opened and the pixel loads, it registers as an "open" in your analytics.
  2. Link Tracking: This method monitors clicks on links within your emails, providing data on engagement beyond simply opening the message.

Custom Tracking Domains: A Necessity for Serious Marketers

To implement these tracking methods effectively and safely, it's essential to use a custom tracking domain. This is a separate domain name, distinct from your primary sending domain, that's integrated into your email service provider's infrastructure for tracking purposes.

Why Custom Domains Matter:

  1. Deliverability Protection: Using a public or shared tracking domain can severely impact your deliverability. Email providers may recognize and blacklist these domains due to misuse by other senders.
  2. Brand Consistency: Custom domains align with your brand, maintaining a professional appearance in all aspects of your email.
  3. Control: You have full control over the reputation and use of your tracking domain.

Setting Up Custom Domain Tracking

While the process can seem daunting, many email service providers like Mailead offer guidance on setting up custom tracking domains. Here's a general overview:

  1. Choose a Subdomain: Select a subdomain of your primary domain for tracking (e.g., track.yourdomain.com).
  2. Configure CNAME Records: Access your domain's DNS settings and add the necessary CNAME records as specified by your email service provider.
  3. Verify and Test: Once configured, verify the setup and run tests to ensure proper functionality.

The Caveat of Open Rate Reliability

While tracking metrics are invaluable, it's crucial to understand their limitations, particularly when it comes to open rates:

  1. iOS Mail App Inflation: The iOS mail app often triggers the tracking pixel upon receipt, not when the email is actually read.
  2. Email Security Services: Some services may trigger opens and clicks as part of their scanning process, before the recipient interacts with the email.
  3. Multiple Opens: If an email appears to be opened multiple times, it's often due to these automated processes rather than genuine recipient engagement.

Given these factors, it's wise to view open rates as a general indicator rather than an absolute measure of engagement.

Link Tracking Considerations

Similar to open tracking, link tracking can provide valuable insights but also comes with caveats:

  1. Security Scans: Email security services may click links to check for malicious content, triggering false positives.
  2. Preview Panes: Some email clients may trigger link tracking when emails are previewed, even if not fully opened.

Balancing Tracking and Deliverability

Once you've verified the success of your cold email campaign, consider the counterintuitive step of reducing or eliminating tracking. Here's why:

  1. Spam Flags: Tracking pixels and redirected links can increase the likelihood of emails being flagged as promotional or spam.
  2. Privacy Concerns: Some recipients may view tracking as an invasion of privacy, potentially harming your brand reputation.
  3. Authenticity: Emails without tracking elements may appear more personal and authentic.

Alternative Metrics for Campaign Success

If you choose to reduce tracking, consider alternative methods to gauge campaign success:

  1. Reply Rates: Direct responses are a clear indicator of engagement and interest.
  2. Conversion Tracking: Monitor actions taken on your website or landing pages after email campaigns.

Successful cold email campaigns require a delicate balance of technology, strategy, and respect for recipient privacy. By implementing custom tracking domains, understanding the nuances of email metrics, and continuously refining your approach, you can create more effective, authentic, and well-received cold email campaigns.

Remember, the goal is not just to reach inboxes, but to create meaningful connections and conversations with your prospects. As you refine your cold email strategy, always prioritize providing value and respecting your recipients' time and privacy.

5 - Maximizing Cold Email Success Through Simplicity

Why Less Is More in Cold Emailing

In the world of cold emailing, simplicity isn't just a preference—it's a strategic advantage. The most effective approach strips away all the bells and whistles, focusing solely on the power of words. This minimalist strategy can significantly boost your campaign's effectiveness and deliverability rates.

The Pitfalls of Complex Emails

Complex emails with various elements can lead to several issues:

  1. Blocked images
  2. Reduced deliverability rates
  3. Distracted recipients

The Benefits of Plain Text Emails

Improved Deliverability

By avoiding images, links, GIFs, videos, attachments, colors, special fonts, and other HTML elements, you sidestep numerous potential pitfalls:

  • Email clients often block embedded images
  • Links can be red flags for spam filters
  • Complex formatting may not render correctly across different email clients

Enhanced Focus on Content

Opting for plain text emails forces you to refine your copywriting skills. Without the crutch of visual or interactive elements, you must craft a message that:

  • Stands on its own merits
  • Compels and engages through the strength of words alone
  • Resonates with the reader

Best Practices for Plain Text Cold Emails

1. Craft Compelling Subject Lines

Your subject line is the first thing recipients see. Make it:

  • Intriguing
  • Relevant
  • Concise

2. Keep It Short and Sweet

Avoid long emails that might lose the reader's attention. Aim for:

  • 3-5 short paragraphs
  • Clear and concise messaging
  • A single, focused call-to-action

3. Personalize Your Message

Even in plain text, personalization is key:

  • Use the recipient's name
  • Reference specific details about their company or role
  • Demonstrate you've done your homework

4. Avoid Spam Trigger Words

Many words can immediately trigger spam filters. Be cautious with:

  • Financial terms (e.g., "eliminate credit," "increase your sales")
  • Health-related phrases (e.g., "remove wrinkles")
  • Overly promotional language

Pro Tip: Use this tool to check your emails before sending.

Examples of Effective Plain Text Cold Emails

Example 1: The Direct Approach

Subject: Quick question about [Company Name]'s marketing strategy

Hi [First Name],

I noticed [Company Name] recently launched a new product line. Congrats!

Have you considered how to optimize your email marketing for this launch?

I've helped similar companies in [Industry] increase their email ROI by 30% within 3 months. Would you be open to a brief chat about how we might be able to do the same for [Company Name]?

Best,
[Your Name]

Example 2: The Value-First Approach

Subject: Free resource for [Company Name]'s content strategy

Hello [First Name],

I've been following [Company Name]'s blog and I'm impressed with your content on [Topic].

I thought you might find this useful: I've created a guide on "Top 10 Content Trends in [Industry] for [Current Year]". It's not published anywhere else, and I'd be happy to send it your way, no strings attached.

Would you like me to forward it to you?

Cheers,
[Your Name]

In the competitive landscape of cold emailing, plain text messages stand out by cutting through the noise. By focusing on crafting compelling copy and avoiding common spam triggers, you can create emails that not only reach their destination but also resonate with your recipients.

Remember, in cold emailing, your words are your most powerful tool. Use them wisely, and you'll see your response rates soar.

6 - Use Spintax in your emails

Understanding Spintax

Spintax, short for "spinning syntax," is an innovative technique used to create multiple versions of a text from a single template. This method is particularly valuable in cold emailing, where personalization and variety can significantly impact engagement rates.

The Basics of Spintax Syntax

Spintax employs a straightforward syntax:

  • Curly braces {} enclose the variable text
  • Vertical bars | separate different options within the braces

For example:

{Hello|Hi|Greetings}, {valued customer|esteemed client|dear friend}!

This simple spintax could generate 9 unique greetings:

  1. Hello, valued customer!
  2. Hello, esteemed client!
  3. Hello, dear friend!
  4. Hi, valued customer!
  5. Hi, esteemed client!
  6. Hi, dear friend!

  1. Greetings, dear friend!

Applying Spintax in Cold Emails

Subject Lines

Crafting varied subject lines is crucial for improving email open rates. Consider this spintax example:

{Discover|Uncover|Reveal} the secret to {boosting|enhancing|improving} your {productivity|efficiency|performance} by {50%|half|2x}

This single line can generate 81 unique subject lines, each conveying the same core message but with subtle variations.

Email Body

Within the email body, spintax can add natural-sounding variations to key phrases:

I hope this email finds you {well|in good spirits|having a great day}. I {wanted to reach out|thought I'd get in touch|decided to contact you} because {I believe|I'm confident|I'm certain} our {solution|product|service} could {significantly benefit|greatly improve|revolutionize} your {business operations|workflow|day-to-day activities}.

Closing Statements

Even sign-offs can benefit from spintax:

{Looking forward to|Excited about|Eager for} the {possibility|opportunity|chance} to {connect|speak|chat} {soon|in the near future|at your earliest convenience},

{Best regards|Sincerely|Warm wishes},
[Your Name]

Benefits of Using Spintax in Cold Emailing

  1. Increased Personalization: By creating multiple variations, your emails appear more personalized and less like mass-produced templates.
  2. Improved Deliverability: Email providers are less likely to flag your messages as spam when they detect variations in content.
  3. A/B Testing on Steroids: Spintax allows you to test numerous variations simultaneously, helping you identify the most effective phrasing.
  4. Time Efficiency: Once set up, spintax can save considerable time in creating multiple versions of your emails.
  5. Natural Language Flow: Well-crafted spintax can make your emails sound more conversational and less robotic.

Implementing Spintax in Your Cold Email Strategy

  1. Start Small: Begin by incorporating spintax into your subject lines or greetings.
  2. Use Synonyms Wisely: Ensure all variations maintain the same tone and message.
  3. Leverage Tools: Utilize spintax generators and checkers to create and verify your spintax strings.
  4. Monitor Results: Track the performance of different variations to refine your approach over time.
  5. Combine with Other Personalization: Use spintax alongside other personalization techniques, such as custom fields for company names or industry-specific terms.

Remember, while spintax is a powerful tool, it's crucial to use it judiciously. The goal is to create natural-sounding variations, not to produce nonsensical or overly complicated text. When used effectively, spintax can significantly enhance your cold email campaigns, improving engagement and conversion rates.

7 - Clean up your prospect list

Before launching any cold email campaign, it's imperative to thoroughly clean and validate your email list. This process not only improves your chances of reaching real recipients but also safeguards your sender reputation. Fortunately, there are numerous tools available to assist with this vital task.

Email Validation Tools: A Comparison

  1. ZeroBounce: Widely regarded as the gold standard in email validation, ZeroBounce offers unparalleled accuracy. While it comes with a premium price tag, many marketers find the investment worthwhile for its superior results.
  2. Debounce: For those seeking a more budget-friendly option, Debounce provides a solid alternative. Our experiences have shown comparable results to higher-priced tools, making it an excellent choice for small to medium-sized campaigns.
  3. Lifetime Deals: If you're working with a pre-validated list and looking for a cost-effective long-term solution, consider exploring lifetime deals on platforms like AppSumo. These can offer significant savings for ongoing list maintenance.

The Catch-All Domain Conundrum

A often overlooked aspect of email list hygiene is the handling of catch-all domains. These domains are configured to accept all incoming email messages, regardless of the specific address used. While this may seem convenient, it poses significant challenges for cold email campaigns:

  1. Deliverability Risks: Sending to catch-all domains can result in a high rate of undelivered or bounced emails, potentially harming your sender reputation.
  2. Validation Difficulties: Traditional email validation methods struggle with catch-all domains, as they cannot definitively confirm whether a specific address is valid or invalid.
  3. Wasted Resources: Emailing non-existent addresses on catch-all domains wastes your campaign resources and can skew your performance metrics.

Strategies for Handling Catch-All Domains

  1. Avoid When Possible: The safest approach is to exclude catch-all domains from your cold email campaigns entirely.
  2. Advanced Validation: Some specialized tools can perform deeper checks on catch-all domains to estimate the likelihood of an address being valid.
  3. Google Account Verification: For catch-all domains associated with Google Workspace, you can use Google Sheets to verify if an email address is connected to an active Google account.
  4. Engagement Filtering: If you decide to include catch-all domains, closely monitor engagement metrics and quickly remove non-responsive addresses.

By prioritizing email list hygiene and implementing robust validation processes, you'll not only improve the immediate performance of your cold email campaigns but also protect your long-term sender reputation. Remember, in email marketing, quality always trumps quantity. A smaller list of engaged, valid recipients will invariably yield better results than a larger list riddled with invalid or uninterested addresses.

8 - Monitoring Your Email Reputation

In the world of cold email marketing, your sender reputation is paramount. If you notice a sudden decline in your open rates or reply rates, it's crucial to investigate potential issues that might be affecting your email deliverability. One often overlooked factor is the presence of your domain or IP address on email blacklists.

Email blacklists are databases maintained by various organizations to identify and flag potential spam sources. Being listed on these can severely impact your email performance, as many email service providers use these lists to filter incoming messages. Some well-known blacklists include Spamhaus and Barracuda Central, but there are numerous others in operation.

If you find yourself on a blacklist, the removal process can vary. In some cases, you may need to pay a fee, while in others, a simple inquiry and explanation might suffice. To check your status, consider using reputable tools such as MXToolbox or Glock Apps. These services can scan multiple blacklists simultaneously, providing you with a comprehensive overview of your email sending reputation.

It's worth noting that appearing on certain blacklists, like SORBS, isn't always cause for alarm. Many legitimate domains find themselves listed there, and it typically doesn't significantly impact overall deliverability.

Stop campaigns that don’t work

When faced with a struggling cold email campaign, swift action is essential. If you start receiving an unusual number of angry replies or requests to unsubscribe, it's a clear sign that your campaign isn't resonating with your audience. In such cases, the best course of action is to immediately pause the campaign.

Continuing a poorly performing campaign can have long-lasting negative effects on your domain reputation. Instead of trying to salvage a failing effort, take this opportunity to step back and reassess your approach. Consider the following elements:

  1. Email copy: Is your message clear, concise, and valuable to the recipient?
  2. Product positioning: Are you effectively communicating the benefits of your offering?
  3. Targeting: Are you reaching out to the right audience?
  4. Email strategy: Is your frequency appropriate? Are you segmenting your list effectively?

By thoroughly evaluating these aspects, you can refine your approach and increase the likelihood of success in future campaigns. Remember, maintaining a positive sender reputation is far easier than trying to rebuild it after damage has been done.

In conclusion, staying vigilant about your email sender reputation and being willing to pivot when necessary are crucial skills in the realm of cold email marketing. By monitoring your performance metrics, regularly checking for blacklisting, and promptly addressing issues, you can maintain a healthy sender reputation and improve your overall email marketing effectiveness.

By following all these guidelines, you'll be well-equipped to launch your first cold email campaign. Remember, the key to success lies in patience, consistency, and strategic planning. With careful attention to inbox warming and thoughtful campaign execution, you'll be on your way to building a robust and effective cold email outreach strategy.