If you're looking to take your marketing email game to the next level, it's time to try Mailchimp Omnivore. This powerful tool examines each email marketing campaign you send on a deeper level so you can rest assured that they are being sent out with the highest accuracy and effectiveness. It works hard to ensure your marketing emails are compliant with industry regulations and improves the efficiency of each batch you send. This can help boost engagement and increase conversions for your business over time. With Mailchimp Omnivore, you have an extra layer of marketing security to optimize each message before it’s delivered – giving you a greater edge in marketing success.

How does MailChimp Omnivore work?

MailChimp Omnivore accurately scans for adresses that might be spamtraps, the emails that might result in abuse complaints or hard bounces, the adresses that are invalid or belong to inactive users, these email addresses trigger spam filters and impact your email sending journey. It is a powerful tool when it comes to detecting accounts that have a high level of risk tied to them, restricting you from sending emails to this group of your inactive audience.

Using MailChimp Omnivore assures you of having a healthy email list that will increase your email reputation prior to sending your email campaign to your users.

What triggers MailChimp Omnivore?

There is no clear answer to why a MailChimp Omnivore warning is triggered, but based on the set of addresses in each send list, Mailchimp Omnivore utilizes an algorithm to forecast audience behavior on email addresses. They designate a risk level, and after it hits a particular point, they block your ability to email them.

Invalid email addresses

An invalid address can mean marketing emails never reach their intended recipients and that’s not good news for anyone! Before purchasing any marketing lists, double check to make sure all the email addresses are valid to guarantee your marketing emails aren't wasted, Invalid addresses include:

Email addresses with typos: this occurs when recipients fill in the forms quickly and misspell their email addresses with typos or formating mistakes;

Inactive addresses: these are email addresses that belong to users who have changed their emails and left their old email address unused, you might still have it on your list but the email owner doesn’t use it anymore;

Changed email provider: an email address can change the email provider or the email provider can be permanently not working which will make its email addresses invalid.

Spam traps

Spam traps are email addresses that ISPs and anti-spam groups use to identify outdated lists or emails that could lead to complaints

Internet Service Providers (ISPs) and blocklist operators utilize email addresses known as spam traps to track down senders that violate email best practices. These spam trap email addresses may have once been valid, but they have since been abandoned or rendered useless.

Unknown adresse

These are email addresses that you haven’t contacted through your MailChimp before, they are rendered unknown by MailChimp and are considered Invalid. New subscribers on your list can be deemed unknown adresses by MailChimp omnivore,  the best way to add new email addresses to your list would be in small numbers to avoid receiving a MailChimp Omnivore warning.

How to deal with MailChimp Omnivore?

The most important action you can take is to act on the warning as soon as you receive one, your email list will be restricted until you selve the issue, to avoid your campaign staying stagnant, the email list you’re sending the campaign to needs to be compliant.

How to prevent MailChimp’s Omnivore warnings?

Avoid generic email addresses

A generic email address is one that is used by many employees. It could be applied to particular teams, departments, projects, and so on. these emails are easily catched by email trap filters because they don’t have a name attached to them, they also mostly have a higher bounce rate and lower open rate which emphysizes the trigger for MailChimp Omnivore warnings.

Undo your recent list upload

If you've received a MailChimp Omnivore warning and you recently imported a new batch of contacts, something in your most recent import definitely contributed to the issue. Undo the most recent import and confirm the addresses again to fix this.

Use double opt-in

A double opt-in happens when a person subscribes to an email marketing list and then receives an email with a confirmation link that needs to be clicked. The person won't actually be added to the email marketing list until the confirmation click has been made. This ensures that the email the subscriber is using is legit and that it is still used by them.

Use an email list validation service

Constantly cleaning and maintaining email lists can be a tedious and time-consuming task, so why not take advantage of email list validation services? Doing so can help save the time it takes to detect invalid email addresses that have been entered incorrectly or are no longer in use. These services use algorithms and real-time email address detecting technologies that allow you to clean email lists quickly without sacrificing quality. With a few simple clicks, you can easily identify wrong email addresses, typos, duplicates, MX records issues, syntax errors, and disposable email addresses — giving you an accurate evaluation of your email list in no time!

The following is a list of the most reputable email list checkers you can use to clean your email list and garantee a better deliverability rate of your email campaign:


One of the key advantages of using this email verification tool is how simple it is to use, how it provides signs for spam traps, and how it makes sure emails are delivered to legitimate email addresses without getting caught in spam filters.

Pricing: a pricing of $49 for 10k validations


Digital marketers use bounceless.io to validate and sanitize email lists in order to improve email deliverability and the effectiveness of email marketing campaigns. Your email lists are processed in bulk, and after they have been verified, you are sent the findings.

Pricing: Bounceless has a pricing model that depends on the number of emails being checked, the pricing ranges from $19 for 2500 emails up to 2M emails for $1899.


Bouncer is an email verification tool that supports organizations in validating and verifying recipients' email addresses during marketing campaigns.

It is most renowned for its real-time verification, email validation API, and bulk email list validation features.

Pricing: They offer a 100 free credits for tests on sign up. 10 000 if you have custom testing needs - just leave us a message. It starts at $ 0.0070 per verification for 1000 - 4000 emails.


They offer Bulk Email List Cleaning & Real-time Email Verification but also spam trap detection.

Pricing: The pricing for 10k Email Verifications is $65, and you have a credit of 100 email verification credits/per month.


NeverBounce, which has over 125,000 subscribers and offers features like real-time email verification and email cleaning services, is best suited for small enterprises. It is effective at instant bounce analysis and high-risk detection. Businesses can use NeverBounce to synchronize email data between systems and validate emails across lead generation pages, registration forms, and other point of entry web pages. It links to Zapier to make it easier to integrate with different programs like Mailchimp, HubSpot, and others.

Pricing: The pricing ranges from up to 10,000 emails for $49.00; up to 50,000 emails for $99.00; up to 100,000 for $159.00; and up to 250,000 for $249.00.

MailChimp's Omnivore is important because it helps to ensure that your email campaign will not end up in the spam folder. This is especially important for businesses who rely heavily on email marketing as a means of communication with their customers. If you are looking to solve the MailChimp Omnivore warning, you can check out Bounceless email list validation service and take advantage of its features for your email campaigns.