A step-by-step Domain Warm-up Guide

Learn everything you need to know about Domain Warm-up

It is no secret that one of the most important aspects of business is ‘networking’. One particular way of networking is sending cold emails. In 2020, the rate of exchange for a cold email was 15.11%. A cold email is an initial email sent to a recipient in hopes of gaining value in terms of favor, sales, chance, or any other dual-sided gain. Then, perhaps, sending thousands of emails for your publicity will be your next move. But if you do so, your email address will immediately be blocked. A crucial step in the process to save your emails from getting flagged as spam is to warm up your domain for cold email.

In this article, we are going to discuss the step-by-step process one needs to follow to warm up domains. Let’s dig into it!

Table of Content

  • What is an Email domain warm-up?
  • Why do you need to warm up your domain?
  • A step-by-step guide to email domain warm-up
  • How Mailmodo can help with email domain warm-up?
  • Conclusion

What is an Email domain warm-up?

The email warm-up is a method for you to develop a reputation and increase the email sending limit for a new email account. The warm-up procedure involves sending email messages from a new email account to a smaller number of people and progressively increasing the number of emails every day.

In 2019, google took more stringent steps from both email sending and receiving sides to detect spam emails. The email service provider gives daily sending limits when a user opens a new email account. Although, a new account can't use it entirely. Ideally, it takes 8-12 weeks to accomplish maximum deliverability. The process of warming up may seem sluggish and repetitive, but it is essential when you want to escape the dreaded spam folder.

Why do you need to warm up your domain?

Email domain warm-up is done to signal your service provider that you are not a robot or scammer. It becomes crucial when you are preparing a high-volume cold email campaign from a new account. Given below are the most important reasons you should not overlook the domain warm-up process.

Avoid spam folder: Every domain acquires a reputation that ranges from bad to good. The host considers a new account suspicious from the outset. Hence email warm-up service is needed to ensure that emails reach the receivers’ inboxes.

Email throttling: Email throttling implies controlling the number of email messages sent to one ISP or remote server at one time. When a large volume of emails is sent at once without domain warm-up, the receiving ISPs often block these messages because they seem to be spam.

Grey-listing: As per SMTP protocol, a greylist is a list of email addresses or domain names that are used by a spam filter to detect suspicious emails. If a message comes from the list's address or domain, it will be quarantined i.e. temporarily blocked. You must warm-up your domain to steer clear of greylisting.

Bounce rates: When you send emails to email addresses that do not exist, your emails get bounced. Email warm-up tools can help you early on to be in the safe zone and eliminate bouncing.

In a nutcase, domain warm-up will increase your deliverability and open rates while decreasing your bounce rates.

A step-by-step guide to email domain warm-up

Domain warm-up demands your time and efforts, as it is a long-term commitment. As you are dedicated to growing your business, email marketing is a cost-effective aid.

1. Set-up a new domain

You might want to use your existing company domain to send emails. As it already has a good reputation, it reduces the energy needed for warming it up. Unfortunately, you might encounter problems and burn your primary domain of everyday business. So, register a new domain and prepare it for email outreach

2. Authenticate your email

Account authentication is the first thing required with a new email address. After registering a single domain name for email outreach, simply follow these steps:

  • For the RPD (return path domain), develop an SPF (Sender Policy Framework)
  • Create a domain-based message authentication, reporting, and Conformance report ( DMARC) and set monitor policy
  • Upgrade IP based Complaint Feedback loop
  • Set up MX (Mail Exchange) for your current domain record

3. Send emails manually

It is always good to start cautiously till you have gained the email service provider’s trust.

  • You should send 10-20 individual emails from the new email address at the opening juncture. A short-cut tip from Mailmodo is to send them to your relatives and friends.
  • Make sure there is a clear interaction with the initial emails, which will help you increase the number of emails.
  • During this time send emails to various email services like Gmail, Yahoo, Outlook, iCloud, Godaddy, etc to broaden your email spectrum.

4. Cherish responses

To achieve full deliverability, it is important to generate engagement in your warm-up emails.

  • It is vital to have some daily conversations as it is a continuous 8-12 week operation. Having a faithful response base gives the ISP a hint about your legitimacy.
  • Subscribe to a few newsletters related to your enterprise sector, regularly getting emails is just as critical as sending new emails to warm up.
  • Double the volume of emails every 2 weeks.

5. Be humane

The final advice to add as many non-robot-like touches to your emails.

  • Don’t send too many emails to the same address at once. Neither should you send email only at a certain time. For example, alternating between mornings and evening and the number of days.
  • Avoid fraud-seeming terms in your email copy like donate, free, etc. at the very start. As 69% of people will mark a mail with a long subject line as spam, be smart with your words to attract open clicks.
  • Add the unsubscribe link because otherwise, your email looks unprofessional. Your credibility can be adversely impacted by even a single spam report against the new account.
  • Personalize your emails by adding as many names as possible. Open rates can be increased by about 22% by adding the name of the recipient in the subject line.

Keep an eye on the process and if the domain warm-up is not meeting your expectations consult an expert. This brings us to the next part.

How Mailmodo can help with email domain warm-up?

Mailmodo provides you a dedicated service from the moment you sign up. We do regular follow-ups of our clients regarding any issue they might face. How can we offer you a good email warm-up service?

  • Mailmodo is a superior email marketing platform with proven deliverability. Our clients celebrate an increase in over 225% conversion rates by using interactive AMP emails.
  • Using Mailmodo’s email marketing software, you can send bulk and triggered emails causing automated warm up.
  • Mailmodo provides a dedicated account manager for enterprise clients to warm up the email domain. Our experts will back you up with any queries regarding the process.
  • Mailmodo integrated trackers to help you monitor the output of your emails and export full reports of user activities & campaign results.


The strictness of the algorithm is to maintain a grip on the junk emails. As you are a genuine user, help the system realize that you are not a spammer by following the above-mentioned practices. While you are learning and becoming a pro, Mailmodo is here to provide a one-stop solution to warm-up your domain and so much more.

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A step-by-step Domain Warm-up Guide