How to Email a Fax Number | Direct Step-by-Step

Emailing a fax number requires an email-to-fax service that converts your message and attachments into a fax signal the phone network understands, with steps and domains varying by provider.

Modern offices and home users are leaving fax machines behind, but the occasional fax request still arrives. Sending a fax through your email inbox is the practical workaround, and it takes about one minute once the service is set up. You do not need a landline, a physical fax machine, or special software — just a compatible email service and a free or paid fax account.

What Is Email-to-Fax and How Does It Work?

Email-to-fax services act as a translator. When you send an email to a specific address (like faxnumber@service.com), the provider strips the attachment, converts it into a fax format, and dials the recipient’s fax machine over the regular phone network. A delivery confirmation is then emailed back to you, confirming the fax was sent or noting a failure.

Method 1: Fax.Plus — Best Free Starting Point

Fax.Plus offers the most straightforward free tier for those new to email-to-fax. The setup requires a free account, but the first ten pages each month are permanently free with no credit card needed.

1. Sign up using the same email address you will send from.
2. Enable the feature by going to Settings > Faxing, clicking Edit on “Email to Fax,” and toggling on the ability to send and include email content.
3. Compose a new email in Gmail, Outlook, Yahoo, or Apple Mail.
4. Enter the recipient number in the To field using the format DestinationNumber@fax.plus (e.g., +16692001010@fax.plus). Always include the country code — +1 for the US and Canada.
5. Attach your document (supported formats include PDF, DOC, DOCX, and JPG). Any text you add in the email body will be turned into a cover letter.
6. Hit send. A confirmation arrives in your inbox within a minute or two, including a report on the sending status.

You can track your remaining free pages and upgrade to a paid plan within your account dashboard.

Method 2: Notifyre — Works with Any Email Client

Notifyre uses a slightly different address format and charges on a credit basis rather than a monthly subscription. This is a good choice if you send faxes only a few times a year.

1. Log into your email client — Gmail, Yahoo, or Outlook works without any add-in.
2. Format the To field like this: FaxNumber@{accountID}.fax.us.notifyre.com. For a US number like 1387799888 with an account ID of 61FKQ4A1, the address becomes 1387799888@61FKQ4A1.fax.us.notifyre.com.
3. Attach your document — only attachments are included in the fax.
4. Critical warning: Do not put any content in the email body. Notifyre ignores everything in the body.
5. Check your credit balance in your Notifyre account before sending; a failed fax due to insufficient credit will still cost you.
6. Send and wait for the delivery confirmation email.

Which Service Fits Your Needs? A Side-by-Side Comparison

The right service depends on volume, budget, and whether you need HIPAA compliance. Below are the most common options with their current limits.

Common Mistakes That Break an Email-to-Fax

These are the errors that most frequently cause a fax to fail. Avoiding them saves you a support ticket and a wasted page.

• Omitting the country code. Every service requires the full international format (+1 for US/Canada numbers). Leaving it off produces a “number invalid” error.
• Putting text in the email body with Notifyre. Notifyre ignores the body completely and only sends the attachment. If you have no attachment, you are sending a blank fax.
• Using a different email address than the one you registered with. Fax.Plus and most other services only accept faxes from the registered email. If you forward the request through a second account, it gets rejected.
• Assuming Outlook can fax natively. Microsoft 365 has no built-in faxing feature. You must use a third-party add-in from the AppSource store, or a standalone email-to-fax service like the ones above.
• Checking your credit or page limits too late. Notifyre and free plans on CocoFax and FaxZero are strict about credit exhaustion. A fax that fails mid-send still counts against your balance.
• Forgetting that HIPAA compliance may disable email-to-fax. Some enterprise plans must disable the email-to-fax channel to meet security requirements, even when HIPAA certification is active on the account.

What to Do if the Fax Still Won’t Send

When the steps above fail, the problem is almost always one of three things.

• Check the recipient’s number. Confirm the area code, the full number, and the country code. A single digit off sends the fax to the wrong machine.
• Verify the email domain. A typo in @fax.plus or in the long Notifyre domain will bounce your email back.
• Test the file format. Not all services support all image formats. If your document is a TIFF or a corrupt PDF, the conversion stage fails silently. Convert to a supported format like PDF or JPG first.

If the problem persists, log into the service dashboard directly and look for an error log. Most providers list the exact reason for a failed fax in your account history.

Final Step-by-Step Checklist for Your First Email-to-Fax

This is the condensed sequence that works across almost every provider. Keep it open on your phone or a second monitor the first time you send a fax through email.

• Sign up for an email-to-fax service and verify the email address you will send from.
• Open your email client — Gmail, Yahoo, Apple Mail, or Outlook all work.
• Attach the document in a supported format (PDF or JPG is safest).
• Enter the recipient’s phone number plus the service’s domain into the To field. Include the country code.
• If using Fax.Plus, you may add optional cover text in the email body. If using Notifyre, leave the body blank.
• Click send. Wait for the confirmation email to land in your inbox before closing the window.