Send faxes directly from Gmail, Outlook, or any email client. Attach your document, address it to a fax number, and hit Send.
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If you already use Gmail, Outlook, or any email client, you can send faxes without leaving your inbox. With usfax.com's email-to-fax feature, you compose an email, attach your document, and address it to the recipient's fax number at @fax.usfax.com. usfax.com converts the attachment and delivers it as a fax. No browser tab, no dashboard — just your regular email workflow.
Send a fax without leaving your inbox — works with Gmail, Outlook, and any email client.
Open Gmail, Outlook, Apple Mail, Yahoo Mail, or any email client and compose a new email. The email-to-fax feature works with every email provider — no special software or plugin required.
Attach the document you want to fax — PDF, Word (.doc, .docx), Excel (.xls, .xlsx), or image files (JPG, PNG, TIFF). You can attach multiple files and they will be combined into a single fax. The email body text becomes an optional cover page.
In the To field, enter the recipient's 10-digit fax number followed by @fax.usfax.com. For example, to fax to (555) 123-4567, enter 5551234567@fax.usfax.com. No dashes, spaces, or country code needed.
Click Send. usfax.com receives your email, converts the attachment to fax format, and transmits it to the recipient's fax machine over the phone network. You receive a delivery confirmation email once it is delivered.
Here is exactly how to format your email for faxing.
To: 5551234567@fax.usfax.com
Subject: Invoice #1042
Body: Please find the attached invoice for services rendered.
Attachment: document.pdf
The subject line becomes the cover page heading. The body becomes the cover page message. The attachment is the fax content.
To: 2125559876@fax.usfax.com
Subject: Contract — Signed Copy
Body: Attached is the signed contract as discussed. Please confirm receipt.
Attachment: document.pdf
Works exactly the same in Outlook desktop, Outlook web, and the Outlook mobile app.
The format is [faxnumber]@fax.usfax.com. Enter the 10-digit fax number (no dashes, spaces, or country code) followed by @fax.usfax.com. For example, to fax to (212) 555-1234, address your email to 2125551234@fax.usfax.com.
Yes. Email-to-fax works with Gmail, Outlook, Yahoo Mail, Apple Mail, and any other email client or provider. As long as your email address is registered with your usfax.com account, you can send faxes from it.
The text in your email body is included as a cover page on the fax. The subject line becomes the cover page heading. Your attached document follows the cover page. If you do not want a cover page, leave the email body blank.
Yes. You can register multiple email addresses with your usfax.com account. Each registered email can send faxes using the email-to-fax feature. This is useful for teams where multiple people need to send faxes from their own email.
usfax.com uses TLS encryption for email transmission and AES-256 encryption for stored documents. For HIPAA-compliant faxing via email, use an email provider that supports TLS encryption (Gmail and Outlook both do) and enable the BAA on your Business plan ($49/mo).
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