Send a fax straight from Microsoft Outlook — no fax machine, no phone line. This guide covers three methods: email-to-fax, the mFax web app, and the built-in Windows Fax driver.
Frequently Asked Questions
Can I send a fax directly from Outlook?
Outlook does not have a built-in fax service. You need a third-party email-to-fax provider like [mFax](https://mfax.to). Once connected, you compose a normal email in Outlook, address it to the fax number @send.mfax.to, attach your document, and hit Send.
Does Microsoft 365 include fax?
No. Microsoft 365 does not include a fax service. On Windows, Office can use the built-in Windows Fax and Scan utility, but that requires a fax modem or phone line. For online faxing, you need a separate service.
Is faxing from Outlook HIPAA compliant?
It can be — if your fax provider encrypts the transmission and signs a Business Associate Agreement (BAA). mFax Business supports HIPAA-compliant faxing. See our [HIPAA fax guide](/blog/hipaa-compliant-fax/) for the full checklist.
What file formats can I fax from Outlook?
PDF is recommended for the best formatting. Most services also accept DOCX, XLSX, JPG, PNG, and TIFF. Avoid password-protected files — the fax gateway cannot open them.
Do I get a delivery confirmation?
Yes. After the recipient's fax machine confirms receipt, you receive a confirmation email in Outlook with a timestamp and page count — just like a read receipt.