Send a Fax from Your Email Inbox
Attach your document to an email, address it to the recipient's fax number @fax.bestfax.com, and we deliver it. Available to Best Fax subscribers.
Quick Answer
Email-to-fax lets subscribers send a fax directly from their email client. Attach your document to an email, address it to the recipient's fax number (e.g., 15551234567@fax.bestfax.com), and hit send. Best Fax converts your attachment to fax format and delivers it to the recipient's fax machine. This feature is available to $10/month subscribers — your sending email must match your registered account.
Works with Any Email Client
Gmail, Outlook, Yahoo, Apple Mail, Thunderbird — any email client that can send attachments works with Best Fax email-to-fax. Use the email app you already know.
Attach and Send
Attach your PDF, Word doc, or image to the email. Best Fax automatically converts it to fax format, optimizes it for fax transmission, and sends it.
Delivery Confirmation
Receive an email confirmation when your fax is successfully delivered to the recipient's machine. Know for certain your document arrived.
Secure Transmission
Documents are encrypted in transit between your email client and our servers using TLS. The fax is transmitted securely to the recipient's machine.
Multiple Attachments
Attach multiple files to a single email and they'll all be combined into one fax transmission. Send complete document packages in one step.
Flexible Addressing
Three ways to address your fax: direct dial format (15551234567@fax.bestfax.com), assigned number format, or set up a custom alias to route faxes to specific numbers without remembering digits.
How It Works
Subscribe to Best Fax
Email-to-fax is available to Best Fax subscribers ($10/month). Sign up and your registered email address is automatically authorized to send faxes.
Compose an Email with Your Document
Open your email client and create a new email. Address it to the fax number followed by @fax.bestfax.com (e.g., 12125551234@fax.bestfax.com). Attach your PDF, Word doc, image, or other supported file.
Hit Send
Send the email from your registered address. Best Fax receives it, converts the attachment to fax format, and transmits it. You'll get a confirmation email when it's delivered — or a failure notice if it can't be completed.
Why Use Email to Fax?
Email-to-fax is the fastest way to send a fax if you're already in your email client. No need to open a separate website or log in to a dashboard — just compose an email the way you always do, attach your document, and address it to the fax number. It's especially useful for subscribers who send faxes frequently and want to integrate faxing into their existing email workflows without switching apps.
How the Email Address Format Works
Best Fax supports three addressing formats. Direct dial: use the fax number (digits only) followed by @fax.bestfax.com, such as 12125551234@fax.bestfax.com for US numbers. Assigned number: use your assigned fax number format. Custom alias: set up a memorable alias (e.g., myalias@fax.bestfax.com) to route faxes to specific numbers. The subject line becomes the fax subject, and the email body becomes a brief cover note. Your attachments become the fax content.
Subscriber Requirement and Security
Email-to-fax is a subscriber-only feature included with the $10/month Best Fax plan. For security, only emails sent from an email address registered with an active Best Fax subscription are authorized to send faxes. This prevents unauthorized use. If an email comes from an unregistered address or an account without an active subscription, it's rejected and no fax is sent.
Email to Fax vs. Browser Faxing
Both methods get your document to a fax machine. Browser faxing through bestfax.com gives you the full feature set: cover page templates with AI enhancement, contact management, real-time fax preview, and delivery tracking in your dashboard. Email-to-fax is faster for simple, one-off faxes when you're already in your inbox. Many Best Fax subscribers use both methods depending on the situation. One-time fax users ($4.95) should use the browser — email-to-fax requires a subscription.
Frequently Asked Questions
Do I need a subscription for email-to-fax?
Yes. Email-to-fax is available to Best Fax subscribers ($10/month). Your registered email address is automatically authorized when you subscribe. One-time fax users can send faxes through the browser at bestfax.com instead.
What email address do I send to?
Address your email to the fax number followed by @fax.bestfax.com. For example, to fax 1-212-555-1234, send to 12125551234@fax.bestfax.com. Use digits only, no dashes or spaces. You can also set up custom aliases for frequently used numbers.
What file formats are supported?
PDF, Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX), images (JPG, PNG, TIFF), and other common document formats. PDF produces the best fax quality.
Do I need to log in?
No. You don't need to log into the website. Just send the email from your registered address and Best Fax handles the rest. Your email address serves as your authentication.
What happens if the fax fails?
You'll receive an email notification explaining why the fax couldn't be delivered. Best Fax automatically retries failed faxes up to 6 times before notifying you of a final failure.
Can I attach multiple documents?
Yes. Multiple attachments are merged in order and sent as a single fax. This is useful for sending multi-document packages like contracts with appendices.
Start sending faxes from your email
Subscribe to Best Fax and send faxes directly from Gmail, Outlook, or any email client. $10/month with unlimited faxing.