How Can You Send an Anonymous Email with Attachment Online for Free?

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Have you ever needed to send a sensitive document but didn’t want a name or email address attached to it? Whether it’s providing confidential tips, whistleblowing, or protecting personal privacy, sending an anonymous email with an attachment can be essential. This guide explains how to send anonymous emails—attachments included—completely free and online.

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Why Send Anonymous Emails?

Protect Identity: Communicate without revealing personal information.
Maintain Confidentiality: Share sensitive files (legal documents, insider information) privately.
Bypass Censorship: Enable free speech in restrictive regions.
Test Email Security: Evaluate spam filters and anonymity protections.

The Problem with Traditional Email

Standard email providers (Gmail, Outlook, Yahoo) record:

IP Address
Sender Information (name, email)
Service Logs

Even creating a new burner email may still link activity to a single account. True anonymity requires services that do not log user data and do not require account registration.

The Risks of Exposure

Legal Consequences: Anonymous sources risk tracing and potential legal action.
Professional Repercussions: Internal reports can lead to retaliation if traced.
Personal Safety Threats: Activists and concerned citizens may face harassment.

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Free, Online, Anonymous Email with Attachments in Seven Steps

Follow these steps to send an anonymous email with attachments, no installations required.

Step 1: Choose an Anonymous Email Service

ProtonMail via Tor
- End-to-end encryption with the free tier.
- Accessible through the Tor network for enhanced anonymity.
- Attachment support up to 25 MB.
Guerrilla Mail
- Disposable email addresses.
- Attachments up to 150 KB.
- Self-destructing inbox after a set period.
AnonBox
- No sign-up required.
- Attachment support up to 10 MB.
- No-logs policy.
AnonEmail (Anonymouse.org)
- No sign-up required.
- Attachments up to 3 MB.
Mailinator
- Public, disposable inboxes (not private).
- Best for testing rather than secure privacy.

Step 2: Mask Your IP Address

Use a VPN service to conceal the origin of your connection.
Or use the Tor Browser for multi-hop, anonymous routing.

Step 3: Prepare Attachments Securely

Remove Metadata: Strip author and device details.
- Windows: Right-click → Properties → Details → Remove Properties and Personal Information.
- Mac: Use Preview or tools like ExifTool to remove metadata.
Encrypt Files (optional):
- Use 7-Zip or VeraCrypt to compress with a password.
- Share the password via a separate channel (e.g., SMS or messaging app).

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Step 4: Compose the Anonymous Email

Example using ProtonMail via Tor:

Open the Tor Browser and navigate to the ProtonMail onion address.
Create a free account (no personal information required).
Compose the message: recipient address, subject line, body text.
Attach the prepared file (up to 25 MB).
Send the email.

Step 5: Verify Delivery

Enable any available read-receipt options.
If possible, request confirmation through a secure, separate channel.
For critical messages, send a small test email first.

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Comparison of Top Anonymous Email Services

Service	Account Needed	Max Attachment	Encryption	Logs Policy
ProtonMail via Tor	Yes (free)	25 MB	End-to-end	No-logs (audited)
Guerrilla Mail	No	150 KB	No	Temporary, no logs
AnonBox	No	10 MB	No	No-logs claimed
AnonEmail	No	3 MB	No	No-logs claimed
Mailinator	No	0 (link only)	No	Public, not private

Example of Anonymous Reporting

In one documented case, a confidential report was submitted to a regulatory authority using ProtonMail through Tor. The report included encrypted attachments of compliance violations. The authority received the information, initiated an investigation, and implemented corrective measures without identifying the sender.

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Advanced Security Measures

Use a Dedicated Device: A secondary phone or laptop never linked to personal accounts.
Generic Content: Avoid timestamps or personal details in the message body.
HTTPS-Only Extensions: Enforce secure connections on all web activity.

Frequently Asked Questions

Are anonymous emails truly private?
Services with audited no-logs policies provide the highest assurance of privacy. Combining encryption with Tor or VPN enhances security.

What if the attachment is too large?
Split files into smaller archives or use anonymous file-sharing platforms (e.g., OnionShare) and email the download link.

Can the email body be encrypted?
End-to-end platforms like ProtonMail encrypt both body and attachments. For other services, pre-encrypt content before attaching.

Will anonymous emails land in spam?
Some services face higher spam filtering. A preliminary test email can help ensure successful delivery.

Is sending anonymous emails legal?
Anonymous communication is generally lawful, provided it is not used for illicit purposes. Users should verify local regulations.

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