What is email spoofing?

Email spoofing, or spoofing, is a fraudulent technique used to make an email appear
to come from a legitimate address when it was in fact sent by a malicious third party.

This type of attack is often used to:

• deceive the recipient,
• spread viruses or malicious links,
• or obtain confidential information (phishing),

How can you tell if an email has been spoofed?

Here are some signs to watch out for:

• The sender appears to be a legitimate address, but the content is strange or suspicious.
• The email contains mistakes, suspicious attachments, or pressures you to act urgently.
• You weren't expecting any email from this person or company.
• As the owner of the domain name, you don't recognize the address used.

How do I retrieve the email's technical information (headers or raw source) to send it to us?

This information will let us analyze the email's real origin and confirm whether or not it is fraudulent.

In webmail:

• Select the email.
• In the "More" ribbon, click the "Show source”.
• A new window opens; copy and paste its content into your request.

In Outlook:

• Select the email.
• In the "Message" ribbon, click the "Actions” or "Other Move Actions” button, select **"Other Actions” **then "Show source”.
• A new window opens; copy and paste its content into your request.

In Apple Mail:

• Select the email.
• In the menu, click "View" > "Message > All Headers" or "Raw Source".
• Copy and paste that section into your request.

In Thunderbird:

• Select the email.
• In the menu, click "Other" > "Show Source".
• A new window opens; copy and paste its content into your request.

Send us the source of the suspicious email via:

Open a request

How can I protect my domain name against spoofing?

To protect your domain against spoofing, we recommend following DNS security
best practices (SPF, DKIM, DMARC).

Check out our FAQs on the topic:
How can I prevent my domain name from being spoofed?
How can you improve your email deliverability?

Updated on: 17/07/2026