Microsoft Outlook doesn't have built-in fax. Here's how to send and receive faxes from Outlook using email-to-fax — no fax machine, add-in, or phone line needed.
Frequently Asked Questions
Can I send a fax directly from Outlook?
Not natively. Outlook doesn't have built-in fax. However, you can send faxes from Outlook by emailing your document to a fax number through an online fax service like [mFax](https://mfax.to). It works like sending a regular email.
Does Microsoft 365 have a built-in fax service?
No. Microsoft has confirmed that Microsoft 365 applications — including Outlook, Word, and Excel — do not include faxing capabilities. You need a third-party online fax service.
Can I fax from Outlook for free?
Most fax services offer a free trial or pay-per-fax option. There's no completely free unlimited fax service for Outlook. [mFax](https://mfax.to) offers pay-per-fax pricing with no subscription required.
Is faxing from Outlook HIPAA compliant?
Standard Outlook email is not HIPAA compliant for fax. For healthcare faxing, use a HIPAA-compliant fax service like [mFax Business](https://mfax.to/business/) that provides encryption, BAA, and audit logging.
Can I fax from the Outlook mobile app?
Yes — the email-to-fax method works from any Outlook app, including mobile. Compose a new email, address it to the fax number at your provider's domain, attach your document, and send.