How Justin Chi Achieved 10x Email Deliverability with Smartlead

Created On:
April 29, 2024
Updated On:
June 3, 2024
justin chi case study on email deliverability

In the dynamic world of startup growth, mastering the art of effective outreach is often the key to open up new opportunities and foster lasting connections.

In a recent interview, Justin Chi, the owner of Cold Email Hackers, reflected on the transformative impact of Smartlead on his agency's outreach efforts.

Justin recounted how, since the agency's inception, they have relied on Smartlead for their email campaigns, a decision that has proven instrumental in their success.

With their previous tools, their emails were often sent to spam folders, yielding negligible results. However, since adopting Smartlead, their campaigns have seen remarkable improvements.

This case study delves into the remarkable journey of Justin Chi and Cold Email Hackers, showcasing their evolution from initial challenges to becoming industry thought leaders.  Let's read on:

How it All Started: The Story of Justin Chi and Cold Email Hackers

Justin began his journey in email outreach while working as an SDR at ZoomInfo. His ability to secure an impressive 100 to 120 meetings per month through cold emails laid the foundation for his venture into cold email outreach for startups.

This journey led to the inception of Cold Email Hackers, a company born out of Justin's passion for helping early-stage software companies grow and succeed through personalized outreach.

His initial clients were garnered through reaching out to sales and marketing leaders, who were impressed by his email writing skills.

However, transitioning from using a well-known brand name like ZoomInfo to establishing credibility and trust with prospects without that backing presented a significant challenge.

Key Challenges Faced Along the Way

Cold Email Hackers primarily targeted early-stage software companies, focusing on industries such as FinTech, HR Tech, Sales Tech, and Marketing Tech. Now Justin faced two primary challenges

Brand Name Dependency

They faced the challenge of establishing credibility and trust with prospects without the brand recognition of a well-known company like ZoomInfo.

This meant he had to craft compelling messaging that resonated with the target audience and conveyed the value of his services effectively.

Overcoming this challenge required a deep understanding of his prospects' pain points and a strategic approach to building relationships through email outreach.

Deliverability Issues

Getting emails into the inbox of prospects was a major challenge for Cold Email Hackers. With spam filters becoming increasingly sophisticated, many of their emails were getting flagged as spam and not reaching their intended recipients.

This hindered their ability to engage with prospects and ultimately impacted their conversion rates.

Addressing this challenge required a combination of technical expertise and innovative strategies to improve email deliverability and ensure that their messages reached the right audience at the right time.

How Smartlead Helped to Solve the Challenges

Justin discovered Smartlead, designed to enhance email deliverability and improve response rates.

He stated that, "I used a bunch of little sending tools and I just realized like we're going to spam. And then I watched Jesse Ouellette's podcast on this. So I just started using Smartlead since then. And then we kind of adopted that whole multi -domain setup from there."

Improve Deliverability

Smartlead's advanced algorithms helped Cold Email Hackers' emails bypass spam filters, ensuring they reached their intended recipients' inboxes.

In its commitment to enhancing email deliverability, Smartlead offers a suite of features designed to optimize outreach campaigns.

Among these features is auto-rotating email accounts. It is a solution that allows users to scale their outreach efforts without concerns about daily limits or email reputation.

With a single click, users can create campaigns, connect mailboxes, and automatically rotate messages, streamlining the process and saving valuable time.

Smartlead's platform includes 110,000 diverse mailboxes spanning Outlook, Google, Zoho, and other providers, empowering users to build and protect their mailbox sending reputation.

By leveraging natural content and humanized sending patterns, Smartlead helps users improve their delivery reputation and increase the likelihood of inbox placement.

The platform's spam rescue feature further safeguards users' mailbox reputations by automatically protecting against spam flagging.

smartlead email deliverability

Enhance Inbox Management

The platform's master inbox feature made it easier for Cold Email Hackers to manage replies, leading to more efficient communication with prospects.

Smartlead offers a range of features designed to optimize inbox management.

One such feature is Views, which provides users with an easier way to manage their Master Inbox effectively by applying and saving filters.

With Views, users can set up multiple filters, including predefined ones, to organize their inbox according to their specific needs.

Another key feature of Smartlead is its instant email replies in the Master Inbox, which allows users to view incoming emails from leads in real-time.

This feature ensures that email responses are displayed in the Master Inbox as soon as they are received, regardless of the Email Service Provider (ESP) used. This real-time access to email responses enables users to stay on top of their communications and respond promptly to leads.

When using Smartlead's Master Inbox, users have the ability to organize responses using three sorting options:

  1. Unread Responses: This option keeps unread messages at the top of the inbox, ensuring that users prioritize these messages and stay on top of important communications.
  2. Response Time (desc): Sorting by descending response time places the most recent responses from leads at the top of the inbox. This feature helps users prioritize recent interactions and respond promptly to new messages.
  3. Sent Time (desc): Sorting by descending sent time brings the most recently sent email responses to the top of the inbox. This sorting option allows users to easily track the timeline of their email communications.
Justin Chi Case Study on Email Deliverability

Increase Response Rates

Smartlead’s multi-domain setup and segmentation features enabled Cold Email Hackers to tailor their messages effectively, resulting in higher response rates.

The tool has the provision of unlimited sender accounts, allowing users to add multiple email domains to a single email address. This flexibility enables users to manage various email campaigns seamlessly.

Additionally, Smartlead conducts email warmups to ensure that campaigns consistently reach prospects' inboxes, helping users avoid spam filters and enhance deliverability rates.

Unlike Gmail or Outlook, Smartlead imposes no daily limit on email sending, providing users with greater freedom and flexibility in their outreach efforts.

Furthermore, it offers custom conditional email triggers, automating the follow-up process. In a way it enable users to address prospects' queries promptly, potentially leading to a 7x increase in meeting bookings.

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Notable Achievements

Since adopting Smartlead, Cold Email Hackers has seen significant improvements in their outreach campaigns:

  • Meeting Conversion Rates: Cold Email Hackers' adoption of Smartlead. has led to a remarkable improvement in their meeting conversion rates. Their best campaigns now convert at a rate of one meeting per 60 emails, a significant leap from their previous rate of one per 600 emails.
  • Client Satisfaction: The implementation of Smartlead has also resulted in higher client satisfaction for Cold Email Hackers. Clients have reported experiencing increased engagement and conversion rates from their email campaigns. This heightened satisfaction has fostered greater loyalty among clients, further solidifying Cold Email Hackers' reputation as a trusted partner in the arena of email outreach.
Justin also shared that, "We have several different clients. So just, we have a mix of consulting and then some just regular regions. So we work about 15 people in total. Four or five of those are just consulting, right? But we have about 15 companies and yeah, we use Smartlead for all of them. So for consulting ones, I always recommend Smartlead as well."

Key Factors Contributing to Success


Smartlead's robust segmentation features have played a pivotal role in Cold Email Hackers' success. By allowing them to target their messages more effectively based on specific criteria, such as industry, company size, or job title, Smartlead has enabled Cold Email Hackers to tailor their outreach efforts more precisely.

This targeted approach has led to increased engagement from prospects, ultimately contributing to higher conversion rates.

Innovative Strategies

Leveraging Smartlead's features, Cold Email Hackers have been able to stay ahead of spam filters and ensure maximum visibility for their messages.

The advanced algorithms have helped Justin Chi and his team bypass spam filters, ensuring that their emails reach their intended recipients' inboxes.

This innovative strategy has been instrumental in improving their deliverability rates and enhancing the overall effectiveness of their email campaigns.

Customer Support

Responsive customer support from Smartlead has been crucial in maximizing Justin's' email outreach efficiency. The ability to address any issues promptly has ensured that Cold Email Hackers can focus on their outreach efforts without any hindrance.

This proactive support has not only streamlined Cold Email Hackers' operations but has also contributed to their overall success and client satisfaction.

Vision for the Future with Smartlead Integrations

Smartlead has been instrumental in Cold Email Hackers' success, particularly in overcoming deliverability challenges and enhancing their outreach strategies.

With the support of, Justin and his team are in a strong position to further assist early-stage software companies in their growth and success journeys.

The platform's innovative features and advanced capabilities have proven to be invaluable assets for Cold Email Hackers. It enabled them to achieve their goals and make a positive impact in the industry.

Justin intends to further capitalize on's features to bolster Cold Email Hackers' outreach endeavors. He also looks forward to exploring additional integrations, such as Calendly or HubSpot calendar, to streamline their follow-up processes.

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Author’s Details


Rajashree specializes in strategizing and planning B2B SaaS product marketing content. As a writer turned researcher, she has a deep-rooted affinity for writing data-driven content. With over 8 years of experience in the industry, Rajashree has documented her insights in a series of blogs covering genres such as SEO, Content Marketing, Lead Generation, and Email Marketing.


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Frequently asked questions

General Questions

What is Smartlead's cold email outreach software?

Email automation FAQs- Smartlead

Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.

How does the "unlimited mailboxes" feature benefit me?

Email automation FAQs- Smartlead

Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.

What do you mean by "unibox to handle your entire revenue cycle"?

Email automation FAQs- Smartlead

The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.

With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.

2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.

3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.

How does Smartlead ensure my emails don't land in the spam folder?

Email automation FAQs- Smartlead

Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder. 

Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.

2. We deploy high-deliverability IP servers specific to each campaign. 

3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.

Can I integrate Smartlead with other tools I'm using?

Email automation FAQs- Smartlead

Certainly, Smartlead is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!

Email automation FAQs- Smartlead

What type of businesses sees the most success with Smartlead?

No, there are no limitations on the number of channels you can utilize with Smartlead. Our multi-channel infrastructure is designed to be limitless, allowing you to reach potential customers through multiple avenues without constraints.

This flexibility empowers you to diversify your cold email outreach efforts, connect with your audience through various communication channels, and increase your chances of conversion. Whether email, social media, SMS, or other communication methods, Smartlead's multi-channel capabilities ensure you can choose the channels that best align with your outreach strategy and business goals. This way, you can engage with your prospects effectively and maximize the impact of your email outreach.

Email automation FAQs- Smartlead

Do you provide me with lead sources?

Smartlead distinguishes itself from other cold email outreach software by focusing on limitless scalability and seamless integration. While many similar tools restrict your outreach capabilities, Smartlead offers a different approach.

Here's what makes us uniquely the best cold email software:

1. Unlimited Mailboxes: In contrast to platforms that limit mailbox usage, Smartlead provides unlimited mailboxes. This means you can expand your outreach without any arbitrary constraints.

2. Unique IP Servers: Smartlead offers unique IP servers for every campaign it sends out. 

3. Sender Reputation Protection: Smartlead protects your sender reputation by auto-moving emails from spam folders to the primary inbox. This tool uses unique identifiers to cloak all warmup emails from being recognized by automation parsers. 

4. Automated Warmup: Smartlead’s warmup functionality enhances your sender reputation and improves email deliverability by maintaining humanized email sending patterns and ramping up the sending volume. 

5. Multi-Channel Emphasis: Smartlead places a strong emphasis on multi-channel outreach. You can reach your prospects where they are with the LinkedIn outreach feature.   With Smartlead’s cold email automation software, you're always one step ahead in your outreach efforts, enjoying the freedom to scale your initiatives and seamlessly integrate with other tools—all while maintaining a focus on maximizing the impact of your outreach.

Email automation FAQs- Smartlead

How secure is my data with Smartlead?

Ensuring the security of your data is Smartlead's utmost priority. We implement robust encryption methods and stringent security measures to guarantee the continuous protection of your information. Your data's safety is paramount to us, and we are always dedicated to upholding the highest standards of security.

How can I get started with Smartlead?

Email automation FAQs- Smartlead

Getting started with Smartlead is straightforward! Just head over to our sign-up page and follow our easy step-by-step guide. If you ever have any questions or need assistance, our round-the-clock support team is ready to help, standing by to provide you with any assistance you may require. Sign Up Now!

How can I reach the Smartlead team?

Email automation FAQs- Smartlead

We're here to assist you! You can easily get in touch with our dedicated support team on chat. We strive to provide a response within 24 hours to address any inquiries or concerns you may have.

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