How to Send a Fax Directly From Your Email

Email-to-fax works by converting your message into a fax and routing it through a fax gateway

When you email to a fax number, your message travels to a service that converts the email into a fax format, then sends it to the recipient's fax machine. You don't need a fax machine yourself — just an email account and the recipient's fax number. The recipient receives it as a standard fax on their end.

The process is straightforward: you address the email to a special fax number (formatted as a phone number with a domain), attach any documents you want to send, and hit send. The service handles the conversion and transmission. Most services deliver within minutes, though some may take longer during peak hours.

Key Takeaways

• Email-to-fax services convert your email into a fax format and send it to a fax machine, so the recipient doesn't need email or internet access.
• You format the recipient's fax number as an email address using the service's domain (for example, 5551234567@faxservice.com).
• Most services charge per page sent, with costs ranging from a few cents to around 25 cents per page depending on the provider.
• Common providers include eFax, MyFax, and Fax.plus, though some require a paid account while others offer limited free sends per month.
• The fax arrives on the recipient's machine with a cover sheet showing your email address and any message you include in the email body.

How to format the recipient's fax number as an email address

The fax number becomes the username part of an email address. If the recipient's fax number is 555-123-4567, you would write it as 5551234567@faxservice.com (without dashes or spaces). Different services use different domains — eFax uses @efax.com, MyFax uses @myfax.com, and Fax.plus uses @fax.plus.

Check the service you're using for the exact format. Some services let you include a cover sheet message by putting it in the email body, while others require you to use a web portal to add a cover sheet. The recipient's fax machine will print whatever you send, so double-check the number before you hit send — a mistyped digit sends your fax to the wrong machine.

What documents you can send and file size limits

Most email-to-fax services accept PDF, Word documents, images (JPG, PNG), and sometimes Excel files. You attach them to the email the same way you would for any other email. The service converts them to fax format, which is why a Word document or PDF becomes a black-and-white image on the receiving fax machine.

File size limits vary by provider, but most allow attachments up to 10 to 25 MB per email. If you're sending multiple documents, combine them into a single PDF before attaching — that counts as one file and is easier for the recipient to handle. Fax machines print in black and white only, so any color in your document will convert to grayscale.

Cost and payment options for different services

Pricing depends on whether you use a free tier or a paid account. Some services like eFax and MyFax require a monthly subscription (typically $10 to $20 per month) that includes a set number of faxes. Others like Fax.plus and HelloFax offer pay-per-fax options where you pay a few cents per page without a subscription.

A few services offer limited free sends — usually 1 to 5 free faxes per month — before charging you. If you send faxes rarely, a pay-per-fax service is cheaper. If you send them regularly, a monthly subscription may save money. Check the service's pricing page before you create an account, because switching providers later means learning a new email format.

Setting up an account and sending your first fax

Create an account on the service's website using your email address and a password. Some services ask for a phone number or billing information during signup, even if you're using a free tier. Once your account is active, you can send a fax when ready — no waiting period or verification step.

Compose a new email in your regular email client (Gmail, Outlook, Apple Mail, or any other). Address it to the fax number in the service's format (for example, 5551234567@efax.com). Put any message you want on the cover sheet in the email body, attach your documents, and send. The service receives the email, converts it, and sends the fax to the recipient's machine.

Tracking delivery and handling failed faxes

Most services send you a confirmation email when the fax is delivered, and some provide a delivery report showing the date, time, and number of pages sent. If a fax fails — usually because the number is wrong, the machine is offline, or the line is busy — the service sends you a failure notice with the reason.

If a fax fails, check the fax number for typos and try again. If the number is correct but the fax still fails, the recipient's machine may be offline or their line may be temporarily unavailable. Ask the recipient to confirm their fax number and try again later. Some services let you resend a failed fax from your account dashboard without paying twice.

When email-to-fax is better than other options

Email-to-fax is fastest when you need to send documents to someone who uses a fax machine but doesn't have email. It's also useful if you're sending to a business that requires a fax for official records — some government offices, medical providers, and legal firms still prefer faxes because they create a paper trail.

If both you and the recipient have email, sending the document as an email attachment is free and faster. If you need to send faxes regularly from your computer, a dedicated fax service or a fax modem may be more cost-effective than pay-per-fax. But for occasional sends to a fax machine, email-to-fax is simpler than buying or renting a fax machine.

Frequently Asked Questions

Can I send a fax to multiple numbers in one email?

Most services don't support multiple recipients in a single email. You'll need to send separate emails to each fax number. Some services offer bulk fax features if you have an account, but these usually require uploading a list through their website rather than using email.

What happens if I send a fax to the wrong number?

The fax goes to whoever owns that fax machine. You can't recall it once it's sent. If you realize the mistake when ready, contact the service's support team and ask if they can intercept it — some can if the fax hasn't been transmitted yet. Always double-check the number before sending.

Do I need to create a separate account for each email address?

No. Most services let you send from any email address once you're logged into your account. The fax will show your account's sender information or the email address you used to send it, depending on the service. Check the provider's settings if you want to control what appears on the recipient's cover sheet.

Can I receive faxes through email too?

Yes, most email-to-fax services also offer fax-to-email. You get a dedicated fax number, and incoming faxes are converted to PDF and sent to your email. This usually requires a paid account. If you only need to send faxes, you don't need to pay for receiving.

What if the recipient's fax machine is out of paper or offline?

The fax service will try to send the fax, and if the machine doesn't answer, it will retry automatically (usually for 24 to 48 hours). You'll receive a failure notice if it can't go through after retries. Ask the recipient to check their machine and try sending again once they confirm it's working.