Boosting Email Deliverability in Cold Email in 2023: Actionable Tips for Success

October 6, 2021
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Boosting Email Deliverability in Cold Email in 2023: Actionable Tips for SuccessBoosting Email Deliverability in Cold Email in 2023: Actionable Tips for Success

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Sending cold emails can be a highly effective way to reach potential customers and grow your business. However, if your cold emails aren't getting delivered, all your efforts might go in vain. In this article, we'll explore some actionable tips to boost email deliverability in cold email campaigns, ensuring that your messages reach the intended recipients' inboxes.

Building a High-Quality Email List

One of the key factors in improving your email deliverability is to maintain a high-quality email list. When you have a clean and engaged list, your email deliverability rates are likely to improve significantly. Here's how you can do it:

Use double opt-in:

Implementing a double opt-in process helps verify email addresses and ensures that subscribers have willingly opted to receive emails from you.

Regularly clean your list:

Removing invalid, dormant, or spammy email addresses is essential to maintaining a healthy email list.

Segment your list:

Dividing your list based on demographics or interests enables you to create personalized and targeted email campaigns, improving deliverability.

Crafting Engaging and Relevant Email Content

Deliverability also depends on the quality of your email content. Engaging recipients with carefully crafted messages can significantly increase open and click-through rates. Consider the following tips:

Personalize your emails:

Use the recipient's name and tailor the message to their specific needs or pain points. Personalization creates a connection and increases the likelihood of a positive response.

Keep it concise:

Short and concise emails are more effective at catching and holding the recipient's attention. Nobody wants to read a lengthy and boring email.

Avoid spam trigger words:

Certain words and phrases can trigger spam filters, causing your email to end up in the spam folder. Be mindful of your language and steer clear of spammy-sounding phrases.

Monitoring and Improving Email Engagement

Your email engagement rates play a crucial role in email deliverability. If recipients are consistently opening and interacting with your emails, it sends positive signals to email service providers. Take the following steps to boost engagement:

Monitor open rates and click-through rates (CTRs):

A low engagement rate can negatively impact deliverability. Regularly assess these metrics and make necessary improvements.

Write compelling subject lines:

A captivating subject line increases the chances of your email being opened. According to a study by SuperOffice, subject lines containing 6-10 words had the highest open rates.

Test your emails:

A/B test different elements of your email such as subject lines, call-to-action buttons, or email designs to determine what resonates best with your audience.

Implementing Advanced Authentication Methods

Implementing proper authentication protocols is crucial for boosting email deliverability. While SPF, DKIM, and DMARC are essential, there are more advanced authentication methods you can consider to further improve email deliverability. Let's explore these more difficult but highly effective techniques:

BIMI (Brand Indicators for Message Identification):

BIMI allows you to display your brand logo next to your emails in the recipient's inbox. It provides visual verification to recipients that the email is legitimate and enhances brand recognition. Implementing BIMI requires additional technical steps, such as creating a Verified Mark Certificate (VMC), but it can give your email campaigns a credibility boost.

PGP (Pretty Good Privacy):

PGP is a highly secure encryption method that ensures end-to-end message privacy. By encrypting the email content, PGP guarantees that only the intended recipient can decrypt and read the message. While PGP is more complex to implement, it provides an extra layer of security, especially when sending sensitive information via cold email.

MTA-STS (Mail Transfer Agent Strict Transport Security):

MTA-STS enforces secure connections between email servers. It requires email service providers to send and receive emails over encrypted connections, preventing interception and tampering during transmission.

ARC (Authenticated Received Chain):

ARC helps overcome email authentication failures when emails are forwarded or modified in transit. It ensures emails maintain their authentication status even when passed through multiple servers.

RUA (Reporting URI for Authentication):

Adding a RUA value allows you to receive detailed reports on email authentication results. These reports can help resolve any authentication issues, improving deliverability.


Implementing advanced authentication methods can be more challenging, but they offer significant benefits in terms of email deliverability and security. Techniques such as BIMI, PGP, MTA-STS, ARC, and RUA provide additional layers of protection and ensure the integrity of your emails. Prioritize email security and deliver credible emails to establish trust with recipients and achieve higher deliverability rates, boosting the success of your cold email campaigns.