How to get your full email header

How to get your full email header

Estimated 2 minute read

Updated Jul 7, 2025, 12:00 AM EST

Table of contents

You will learn
What is an email header?
Gmail (including Google Workspace)
AOL
Outlook / Hotmail / Outlook 365 (Web-Email)
Yahoo
Apple Mail (Mac OS)
Additional resources

You will learn

Learn what an email header is and how to get it depending on your inbox provider.

Our Compliance Team sometimes requests that you provide us an email header so we can better troubleshoot and investigate specific issues.

What is an email header?

An email header contains a lot of information about an email and the network path it has taken. This type of information helps our Compliance Team narrow down issues. All emails have an email header and all email clients pull certain information from the header and display it in a user-friendly way. The type of information you can find includes the from address, from/reply-to email address, subject line, recipient, and more.

Select your email client/inbox provider for specific instructions on how to obtain an email header:

If you use a different email client, check its help documentation for instructions on viewing the full email header.

Gmail (including Google Workspace)

Open the email in Gmail in a web browser, then follow Google’s instructions for viewing and copying the full email header.

Send the copied full header or downloaded original message to the Compliance Team that requested it.

AOL

Follow the AOL instructions under Other mail services in Google’s guide to viewing email headers.

A new window will open displaying the raw header. Copy and paste this and send it to us directly.

Outlook / Hotmail / Outlook 365 (Web-Email)

Follow Microsoft’s instructions for viewing email headers. Choose the Web tab for Outlook on the web or Outlook.com, including Hotmail accounts.

Once the full email header is displayed, copy and paste it and send it to us directly.

Yahoo

Follow the Yahoo! Mail instructions under Other mail services in Google’s guide to viewing email headers.

A new tab will open with the raw header. Copy/paste this and send it to us directly.

Apple Mail (Mac OS)

Follow the Apple Mail instructions under Other mail services in Google’s guide to viewing email headers.

Copy and paste the full header and send it to us directly.

Additional resources

How to change your sender email address and sender name

Learn how to change the sender email address and sender name in your Klaviyo account. - Understanding email deliverability

Learn about email deliverability, including the steps you can take to establish a strong sender reputation so that your emails are delivered to the inbox.

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