SMTP Warm Up Explained - Unfiltered

Don't let your emails get lost in the spam folder. Learn all about SMTP warm-up and how it can help ensure deliverability for your email campaigns.
Email marketing has become crucial for companies where everything, especially communications, is digital.

However, successfully getting your emails into your subscribers' inboxes can be challenging. That's why we're here to help you optimize your email marketing success.

In this blog, we'll explore the often-overlooked process of SMTP warm-up and show you how to do it effectively with Unfiltered.

Let's dive in!

What is SMTP Warm Up?

SMTP (Simple Mail Transfer Protocol) warm-up is a process used to gradually increase the volume of emails sent through a specific SMTP server or IP address to establish a positive sending reputation.

This practice is essential to improve deliverability and ensure that emails reach recipients' inboxes rather than being marked as spam. SMTP warm-up is typically used when using a new SMTP server or IP address or when significantly increasing email sending volumes.

Every email service provider has its own set of algorithms, or filters, that are designed to detect spam emails, or those that are potentially harmful to their users.

You need to establish a positive sender reputation with these filters to ensure your emails are not flagged and delivered to subscribers’ inboxes.

This is why Unfiltered is set up with SMTP.
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Warm Up Your Email with Unfiltered

Unfiltered helps you warm up your email in a hassle-free way.

With our automatic warm-up feature, you can easily create a custom email sending schedule customized to your needs. Then, you can choose if you want to gradually increase or decrease your email volume over time until you reach your desired daily email sending limit.

This helps ensure that your emails are not flagged as spam and are delivered to your subscribers' inboxes.

You can also see real-time email delivery, including the percentage of emails that hit the inbox, spam, your email health, and how many emails have been sent.

Using Unfiltered not only saves you time but also helps you optimize your email campaigns by giving you an accurate picture of your email performance.


SMTP warm-up is a crucial but often overlooked process in email marketing.

With Unfiltered, you can seamlessly warm up your email in a way that is hassle-free and effective.

Gradually increase your email volume over time and optimize your campaigns with real-time analytics, to establish a positive sending reputation, improve your email deliverability, and ultimately achieve better results.

So, if you're serious about email marketing, give Unfiltered a try today and see the difference it can make!

Start a free trial here!
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