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Aastha Shaw / November 10, 2020 May 28, 2025

Catch-all Emails: Impact on Deliverability & How to Handle Them


Catch-all Emails: Impact on Deliverability & How to Handle Them

Precision and effectiveness are crucial components in the world of email marketing.

Crafting the perfect email marketing campaign involves meticulous planning and execution to ensure your message reaches your target audience.

However, there are certain types of risky email addresses that look valid but can impact your email deliverability and deteriorate your campaign performance. One example of this is catch-all email or accept-all email type.

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Such emails are trickier to deal with, and there is often confusion about what they are exactly and whether to include them in outreach campaigns.

So, in this blog, we have covered everything about catch-all emails, including the threats related to them, and how to verify and avoid email catch-alls.

Table of Contents:


  • What is a Catch-all Email?
  • Example of a Catch-all Email
  • Are Catch-All Emails the Same as Aliases?
  • Why Businesses Use Catch-All Emails?
  • Should Marketers Be Concerned About Catch-all Emails?
  • How Catch-all Emails Impact Email Deliverability?
  • Advantages of Catch-Alls (When Used Right)
  • Disadvantages of Sending to Catch-Alls
  • How to Identify and Verify Catch-All Emails?
  • Should I Send Out Emails To a Catch-all Domain?
  • FAQs: Catch-all Emails & How To Manage Them

What is a Catch-all Email?


A catch-all email, also known as an accept-all or default email address, is a mailbox configured to receive all messages sent to a specific domain, regardless of whether the specific recipient address exists.

Example of a Catch-All Email


Let’s take the domain abccorp.com. If the organization sets up a catch-all address (say, [email protected]), then:

  • [email protected] - Delivered to catch-all inbox
  • [email protected] - Delivered to catch-all inbox
  • [email protected] (even if it doesn’t exist) - Still delivered to the catch-all inbox

This mechanism is designed to catch misspelled addresses or unregistered aliases and prevent message loss. But there's a flip side: you never know which addresses are real and which aren't—making targeting and personalization tricky.

Are Catch-All Emails the Same as Aliases?


No, they’re not the same—and confusing them could harm your strategy.

  • Catch-All Email: Accepts all messages sent to a domain, regardless of the recipient address.
  • Email Alias: A secondary address that forwards messages to a primary inbox (e.g., [email protected] forwards to [email protected]).

Aliases are purposeful and controlled. Catch-all addresses are broader and less predictable. Aliases can help organize incoming mail. Catch-alls are more of a last-resort net for all domain traffic.

Why Businesses Use Catch-All Emails?


Catch-all email addresses are used by businesses for practical reasons, especially when managing large volumes of messages or ensuring no important email gets lost.
Here's why they’re often set up:

1. To Catch Mistyped Emails
Sometimes people make small spelling errors in email addresses. A catch-all inbox makes sure those messages still get delivered—even if the address doesn’t actually exist—so no potential lead or customer message slips through the cracks.

2. Helpful for Small Teams
Instead of creating a separate email for every employee or department, small businesses often prefer one central inbox. A catch-all setup handles all incoming emails, even the unexpected ones.

3. For Record-Keeping and Compliance
In some industries, companies must store every email sent to their domain—even if it goes to an unused address. A catch-all helps capture all of those messages automatically.

4. Filter Out Spam
Believe it or not, some companies use catch-all addresses to collect and review spam. They analyze these emails to strengthen filters and improve security.

🚨Should Marketers Be Concerned About Catch-all Emails?


“While catch-all emails can be useful, they’re not without risks.”

These inboxes often attract a lot of spam and can be hard to manage.

And for email marketers, they make it tough to know if the email is reaching a real person, unless you use an advanced verification tool.

Here’s where things get real: catch-all emails are a double-edged sword.

15–25% of B2B emails on average lists turn out to be catch-alls. If you don’t handle them right, you could face:

  • Higher Bounce Rates: Not all catch-alls are deliverable. Some domains are configured to initially accept all mail and silently reject it later.
  • Low Engagement: These emails often go to centralized inboxes managed by multiple people, or worse, maintained by no one. Engagement is typically poor.
  • Reputation Damage: Sending to too many unknown or low-quality addresses leads to spam complaints, blacklisting, and a lower sender score.

How Catch-all Emails Impact Email Deliverability?


Deliverability is, without a doubt, one of the key indicators to take into account when putting together a mailing campaign.

And when you send emails to catch-all emails, it can have both positive and negative impacts on email deliverability, depending on how they are managed and utilized.

Advantages of Catch-Alls (When Used Right)


If used strategically and in moderation, catch-all addresses can provide benefits:

1. Catching Misspelled Leads: You won’t miss a prospect just because someone typed [email protected] instead of [email protected].

2. Wider Coverage: You get access to emails that otherwise would’ve bounced.

3. Lead Recovery: For abandoned or transitional contacts, catch-alls can help you re-engage.

Disadvantages of sending emails to Catch-alls:


Let’s get into the risks:

1. High Bounce Risk: Many catch-alls are configured to accept first, reject later. This increases your bounce rate and damages sender reputation.

2. Spam Complaints: If your email reaches someone who never signed up and doesn’t recognize your brand, they may hit the “Spam” button.

3. Poor Inbox Placement: If mailbox providers (Gmail, Outlook, Yahoo) detect emails to risky addresses, your domain might be flagged.

4. Wasted Budget: Poor engagement means lower ROI on your campaigns.

These will ultimately lead to a bad sender score and poor email deliverability.

Thus it is important to verify all the emails in your list and manage email catch-alls properly before shooting out your email marketing campaigns.

How to Identify and Verify Catch-All Emails?


Identifying and verifying a catch-all email is no rocket science. All it takes is a good email verification tool that offers catch-all email verification.

Clearout’s AI Email Verifier goes a step further and provides advanced catch-all resolvers to give you accurate scoring and information on whether the email is valid, invalid, or a catch-all.

how to validate catch-all emails

✅ Real-time email verification checks ensuring 99% data accuracy

✅ Detects whether an email belongs to a catch-all domain or any other risky email category

✅ Uses real-time SMTP checks to estimate deliverability

✅ Scores emails as “safe to send,” “risky,” or “undeliverable”

✅ Offers AI insights to help you segment your lists and plan email blasts better.

✅ Offers bulk verification and seamless integrations (CRMs, email tools, etc.)


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User Picture
(Did you mean : )
Safe To Send
? Based on best practices followed in the industry, Safe To Send flag will provide one of the 4 values to know the deliveriablity chances
Yes - Valid mailbox addresses with guranteed deliveriablity of message thus help to keep sender reputation high %
No - Invalid mailbox addresses can be safely removed, try sending message will bounce and degrade the sender reputation
Risky - Contact these email addresses only when bounce rate is less than 5 % or when using own email sending service
Unknown - Due to unavoidable reasons the status of the email cannot be determined, so retry before using them
Status
? What does Status value means?
Valid - Secure, go ahead and send
Invalid - Don't send, drop these emails
Catch-all - Maybe, at your own risk
Unknown - Don't send, verify later an hour to know the status
Reason
Account
Domain
Disposable
Free Account
Role Account

Upon email verification, you will know how many emails in your lists are catch-alls and then decide on how you deal with them. Now the question remains…

Should I Send Out Emails To a Catch-all Domain?


The answer is you should…But with Caution!

Throwing away a good opportunity to engage with your customers is not a good idea.

Instead, you can make a smart move to verify, identify, and segment the catch-alls into different campaigns.

Include a limited number of catch-all email accounts in each campaign.

This prevents getting a high bounce rate on a single email campaign and saves your email deliverability score from going downhill.

When you segment your email lists properly and send out relevant content to catch-all email accounts, there will be a higher chance of getting better engagement.

Also, don’t forget to monitor how the campaigns are performing.

If you get a hard bounce from a catch-all email or your emails are not being opened for a long time, it's better to remove them from your email lists.

Most importantly, pick a tool with high accuracy so that you can blindly trust the results and focus on optimizing your campaigns instead of worrying about the quality of your email lists.

In short…don’t completely eliminate catch-alls from your lists. Instead:

  • Verify and Score Them: Never send without knowing their risk profile.
  • Segment Carefully: Don’t lump catch-alls with high-value leads.
  • Use Custom Messaging: Send lighter, informational emails to test engagement.
  • Monitor Behavior: If no opens or clicks after 2–3 sends, suppress or remove.

Whether or not you decide to send emails to catch-all domains, you must swear by regular email list cleaning to identify catch-alls and remove all types of risky email addresses that can hurt your email deliverability.

Try Clearout’s Advanced Catch-all Resolver.
Enjoy Better Deliverability!


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FAQs: Catch-all Emails & How To Manage Them


1. What is the difference between a catch-all email and a valid email?


A valid email is an address that has been confirmed to exist and can receive emails.

A catch-all email, on the other hand, accepts any email sent to the domain, regardless of whether the specific address exists, making it harder to determine its validity.

Just because a catch-all accepts your email doesn’t mean someone is reading it.

2. Are catch-all emails safe to send to?


Catch-all emails are not always safe to send as you can’t be certain if the email account is active or monitored.

Sending too many emails to risky or inactive catch-all addresses can lead to high bounce rates and lower your sender reputation.

3. How can I know if an email is a catch-all?


You can’t detect a catch-all email just by looking at it.

Instead, use an advanced email verification tool like Clearout that can run deep domain checks and classify whether an address belongs to a catch-all domain.

4. Can catch-all emails be verified?


Yes, but only with specialized tools.

Most standard verifiers mark them as "unknown" or "risky." Tools like Clearout use AI-driven verification that provides confidence scores and activity indicators so you can decide if it’s worth sending to them.

Whereas many other verifiers fail to offer advanced catch-all email resolution.

5. Should I completely remove catch-all emails from my list?


Not necessarily. If your email verifier shows that they’re potentially safe or active, you can segment them and send low-risk, high-value emails.

Monitor their engagement and remove them if they bounce or remain inactive.

6. How do I handle catch-all emails in cold email campaigns?


Segment them separately, run them through a verifier, and send emails in smaller batches. Follow best cold email outreach practices for better deliverability.
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