Get 20% OFF for your first month with the Starter Plan – Start today 🎉
Table of contents

What’s IP Warm Up ? (2024)

damien ceo mailreach
David Chastanet
Email Deliverability Expert

Step into the future of email marketing with IP warm-up! Get ready to unlock the full potential of your email marketing in 2024!


Imagine launching an email marketing campaign with high hopes, only to find out that your emails are landing in the spam folder or being blocked altogether. Frustrating, right? The good news is that IP warm-up can help you avoid these issues and ensure your emails reach their intended recipients. In this blog post, we’ll explore the process of IP warm-up, its benefits, and how to implement it successfully, so you can enjoy the rewards of a thriving email marketing campaign.

Key Takeaways

  • IP warm up is essential for successful email deliverability, involving verifying the legitimacy of subscribers and increasing sending volume gradually.
  • Establishing a positive sender reputation with ISPs requires careful planning, monitoring key metrics and leveraging automated tools to optimize success.
  • Crafting high quality content & engaging with subscribers are important best practices for IP warm up success.

Understanding IP Warm Up

Establishing a positive sender reputation with internet service providers (ISPs) is pivotal for successful email deliverability. IP warm-up, the process of gradually increasing email volume from a new IP address, helps establish a positive reputation and ensures high deliverability. Adequate warming up of your IP address can stave off instances of emails being blocked or labeled as spam when sent to your entire list simultaneously.

The initial step in IP warming is verifying that your list contains only legitimate subscribers who have consented to receive your messages. It typically takes four to six weeks to complete the IP warm-up process, during which you should closely monitor deliverability rates and adjust your sending volume accordingly.

Initiating IP warming with a minor fraction of total subscribers, preferably the most engaged ones, is advisable. This should be no more than 5,000 in number.

The Need for IP Warm Up

The necessity for IP warm-up stems from the significance of upholding a commendable sender’s reputation while circumventing being labeled as spam or blocked by ISPs. Using a new IP address without warming it up can lead to delayed email delivery speeds, emails being sent to spam folders, and even blacklisting. By warming up your IP, you demonstrate to ISPs that you are a legitimate email sender, create predictable sending patterns, and safeguard your inbox if it’s compromised.

Email validation services facilitate the scanning of your entire mailing list, identifying spam traps, bots, and other invalid emails that could cause negative effects like bounces, spam complaints, or may even go unnoticed. This is a crucial step in the IP warming process, as it ensures that your emails are reaching the right audience and contributing to a good sender reputation.

Key Factors Influencing IP Reputation

Factors affecting IP reputation include:

  • Spam reports
  • Bounce rates
  • Engagement rates
  • Unsubscribe requests
  • Email content
  • Blacklisting

A high number of spam reports or bounce rates can negatively impact your IP reputation, as it demonstrates that your emails are unwanted or undeliverable. On the other hand, high engagement rates suggest that your emails are being opened and read, which can positively influence your IP reputation.

Preserving an excellent IP reputation necessitates the monitoring of crucial metrics such as deliverability, bounce rates, and spam complaints. Keeping an eye on these metrics allows you to make necessary adjustments to your email campaigns and ensure the ongoing success of your IP warming process.

IP Warm Up Strategies for Success

There are two main approaches to IP warm-up: manual and automated. Both strategies involve gradually increasing email volume during the warm up period and building a positive reputation with ISPs, but they differ in the level of hands-on management required.

The forthcoming sections delve into the details of manual and automated IP warm-up strategies that will guide you in selecting the appropriate approach for your email marketing requirements.

Manual IP Warm Up

Manual IP warm-up requires a predetermined schedule and hands-on management of email volume increases. This approach involves:

  • Establishing hourly or daily sending limits
  • Incrementally raising the quantity of emails sent
  • Prioritizing sending to your most engaged subscribers during this process, as their interactions with your emails will contribute to building a favorable sending reputation with ISPs.

While manual IP warm-up can be time-consuming, it offers greater control over the warming process and allows you to make necessary adjustments based on your specific needs. Monitoring key metrics like:

  • open rates
  • click-through rates
  • bounce rates
  • spam reports

This will help you gauge the success of your manual IP warm-up strategy and ensure that you’re building a strong sender reputation.

Automated IP Warm Up

Automated IP warm-up, on the other hand, utilizes tools and software to streamline the process and monitor progress. With this approach, you can:

  • Focus on creating high-quality content
  • Engage with subscribers
  • Let the software take care of gradually sending emails to a limited number of recipients.

Automated IP warm-up offers benefits such as aiding the establishment of a positive sending reputation and preventing deliverability issues. By combining automated IP warm-up with high-quality content and subscriber engagement, you can ensure a smooth and successful IP warm-up process.

Maximizing Deliverability with Dedicated IP Addresses

Dedicated IP addresses offer greater control over sender reputation and deliverability compared to shared IP addresses. While shared IPs pool the reputation of multiple senders, dedicated IPs allow you to build and maintain your own reputation, ensuring maximum deliverability.

The forthcoming sections will delve into the process of migrating to a new dedicated IP address, obtaining new IP addresses, and how to upkeep a healthy dedicated IP address to optimize your email deliverability.

Migrating to a Dedicated IP Address

Migrating to a dedicated IP address involves switching from a shared IP and following a warm-up plan to establish a positive reputation. To ensure a smooth migration, you’ll need to set up the IP address, configure the DNS records, and incrementally increase the amount of emails sent from the IP address. Monitoring key metrics like delivery rate, bounce rate, open rate, and click-through rate will help you make informed adjustments to your warm-up plan and ensure the success of your migration.

By following a well-thought-out warm-up plan during the migration process, you can ensure that your dedicated IP address quickly builds a positive sender reputation, resulting in improved email deliverability and a more successful email marketing campaign.

Maintaining a Healthy Dedicated IP Address

Maintaining a healthy dedicated IP address requires monitoring key metrics, following best practices, and adjusting strategies as needed to optimize deliverability and sender reputation. For maintaining a healthy dedicated IP address, regular monitoring of your reputation, blacklist checks, implementation of email authentication protocols, and creation of high-quality content are necessary.

Engaging with subscribers is another crucial aspect of maintaining a healthy dedicated IP address. By fostering strong connections with your audience and maintaining high engagement rates, you can demonstrate to ISPs that your emails are valuable and trustworthy, ensuring ongoing email deliverability success.

Email Authentication Protocols

Email authentication protocols, such as SPF, DKIM, and DMARC, play a vital role in building a reliable reputation with ISPs and protecting recipients from spam. These protocols help verify the identity of the sender and ensure that your emails are viewed as legitimate by ISPs, increasing the chances of your emails reaching their intended recipients.

The upcoming sections will cover the steps to implement and monitor email authentication protocols to boost your IP warm-up success.

Implementing Email Authentication

Implementing email authentication involves setting up and configuring the necessary TXT records for SPF, DKIM, and DMARC. SPF (Sender Policy Framework) is a DNS record that allows you to designate authorized domains to send messages on your behalf, while DKIM (Domain Keys Identified Mail) provides encryption to all outgoing emails, ensuring the integrity of the email content.

DMARC (Domain Based Message Authentication) is a DNS protocol that leverages both SPF and DKIM to help ISPs verify the legitimacy of emails, further enhancing your sender reputation and email deliverability. Implementing these email authentication protocols can validate your IP address’s trustworthiness to ISPs, thereby enhancing your IP warm-up success.

Monitoring Email Authentication Performance

Monitoring email authentication performance helps ensure ongoing compliance and effectiveness in maintaining a positive sender reputation. Tools like Everest and MXToolbox can be employed to inspect DKIM, SPF, and DMARC records, allowing you to identify any potential issues and make necessary adjustments.

Regularly reviewing your email authentication protocols and monitoring feedback loops with major ISPs can help you maintain a healthy sender reputation and ensure the ongoing success of your IP warm-up process. By keeping a close eye on your email authentication performance, you can proactively address potential issues and continue to enjoy the rewards of a successful email marketing campaign.

Best Practices for IP Warm Up Success

To ensure IP warm-up success, it’s important to follow best practices in crafting high-quality content and engaging with subscribers. By focusing on these key aspects, you can build a strong sender reputation with ISPs and ensure that your emails reach their intended recipients.

In the following sections, we’ll explore best practices for creating high-quality content and engaging with subscribers to maximize the effectiveness of your IP warm-up process.

Crafting High-Quality Content

High-quality content involves personalization, readability, and avoiding spammy words or phrases to reduce the likelihood of being flagged as spam. To create content that resonates with your audience, consider their needs and preferences, use appropriate formatting for readability, and devise compelling headlines and introductions.

Additionally, providing valuable and helpful information, addressing customer needs, and consulting subject matter experts for specialist knowledge can further enhance your content’s quality and effectiveness. By crafting high-quality content, you can increase engagement rates and build a strong sender reputation, contributing to a successful IP warm-up process.

Engaging with Subscribers

Engaging with subscribers through regular conversations and replies helps build trust and credibility with ISPs, leading to a quicker IP warm-up process. By fostering engagement with subscribers, you can demonstrate to ISPs that your emails are valuable and trustworthy, improving your sender reputation and the overall success of your IP warm-up process.

Strategies to foster engagement with subscribers through marketing emails may include:

  • Crafting dynamic and storytelling content
  • Utilizing compelling subject lines
  • Designing polished emails
  • Personalizing emails
  • Incorporating specific and easy-to-identify call-to-actions (CTAs)

By focusing on subscriber engagement, you can cultivate a strong connection with your audience and ensure the ongoing success of your IP warm-up process.

Monitoring and Adjusting Your IP Warm Up Plan

Monitoring and adjusting your IP warm-up plan is a crucial aspect of ensuring its success. By tracking key metrics and making informed adjustments based on performance, you can optimize your deliverability and sender reputation.

In the following sections, we’ll discuss the key metrics to monitor and how to make informed adjustments to your IP warm-up plan.

Key Metrics to Monitor

Key metrics to monitor include open rates, click-through rates, bounce rates, and spam reports. Open rates indicate the percentage of emails that were opened by the recipient, while click-through rates represent the percentage of emails that were opened and clicked on by the recipient.

Bounce rates and spam reports, on the other hand, can negatively impact your sender reputation if they are high, as they demonstrate that your emails are unwanted or undeliverable, potentially landing in the spam folder.

Tracking these key metrics allows for the identification of potential issues or areas that need improvement in your IP warm-up plan. This information allows you to make necessary adjustments to your email campaigns and ensure the ongoing success of your IP warm-up process.

Making Informed Adjustments

Making informed adjustments to your IP warm-up plan involves analyzing performance data and modifying strategies as needed to optimize deliverability and sender reputation. By understanding the current situation and recognizing areas that require improvement, you can gather data and information related to deliverability, sender reputation, and engagement. Analyzing this data by scrutinizing trends, recognizing patterns, and searching for correlations will help you identify the most effective adjustments to make.

After identifying the necessary adjustments, implement them and monitor the key metrics’ performance to validate the effectiveness of your changes. By making informed adjustments to your IP warm-up plan, you can continue to optimize your email deliverability and sender reputation, ensuring the ongoing success of your email marketing campaigns.


In conclusion, a successful IP warm-up process is essential for building a strong sender reputation and ensuring your email campaigns reach their intended recipients. By following best practices in crafting high-quality content, engaging with subscribers, implementing email authentication protocols, and monitoring key metrics, you can optimize your IP warm-up process and enjoy the rewards of a thriving email marketing campaign. Remember, the key to IP warm-up success lies in the gradual increase of email volume, constant monitoring, and making informed adjustments based on performance data.

MailReach is compatible with any inbox / SMTP

No items found.
No items found.

More resources for your deliverability

Made with ❤️ and 🥖 in Paris, France 🇫🇷