To fax from Outlook, use Fax.Plus with a paid plan: address an email to the fax number followed by @fax.plus, attach your document and send. No fax machine is needed. Start here to learn how to fax from Outlook.

The email to fax feature lets you send documents from Outlook on a computer or mobile device. This workflow requires a paid Fax.Plus plan. The free option to send fax online uses the web or mobile app instead.
Use the same sender email address as your Fax.Plus account and make sure you have enough credits or available pages. In Fax.Plus, open Settings > Faxing > Email to Fax > Configure. Enable Ability to Send Fax via Email, then confirm. Enable Include Email Content in Fax only if you want the email body included as the cover page.
After sending an efax from Outlook, check its delivery status by email or in Fax.Plus. Receiving requires a fax number and notification settings. Printer and Office workflows use separate tools, as described below.
To receive faxes in Outlook, you need a fax number assigned to your Fax.Plus account and receiving email notifications configured for your Outlook address. Incoming faxes can then arrive in your inbox. Use Outlook rules to organize or archive the messages according to your needs.
Use your scanner to create a file, then send it through Outlook. Before sending, complete the Email to Fax setup described above.
You can forward an incoming fax email from Outlook to an authorized recipient. Check the recipient and your organization’s document-handling policy before sharing attachments. Receiving notifications and access to fax numbers are configured in Fax.Plus.
Log in to your Fax.Plus account to check receiving notifications. Your Profile contains account preferences.

Attach a saved Word document to Outlook to send it through Email to Fax. Fax.Plus also offers a separate Microsoft Office add-in for supported Office applications. This is different from the Outlook email workflow and does not install a native Outlook fax button.
Check the delivery-status email to see whether your fax succeeded or failed. For transmission details and a downloadable Advanced Confirmation Report, open the sent fax in Fax.Plus.
Delivery confirms the fax transmission outcome. It does not confirm that a person has read the document.
No. Outlook does not send faxes on its own. You need an external fax service to turn an email into a fax transmission. With Fax.Plus, you can use Outlook in Microsoft 365 to send supported attachments through an enabled Email to Fax account on a paid plan.
No. Fax.Plus Email to Fax requires a paid plan, even if you already have an Outlook account. The free sending allowance in the Fax.Plus web and mobile apps does not enable sending from Outlook. Check your plan, sender address, activation settings and available pages or credits before sending.
No Outlook add-in or native fax button is required for the Fax.Plus email workflow. Compose a normal email from your registered sender address and use the recipient format shown in the guide. Fax.Plus currently has no native Outlook add-in. Its Microsoft Office add-in serves separate supported applications.
No. Outlook email sending does not require a developer integration or the Fax.Plus fax API. The API is a separate option for adding fax functionality to your own application. For this Outlook workflow, use your registered email address with a paid plan and Email to Fax enabled.
No. With an enabled paid Fax.Plus account, you can send from Outlook wherever you have an internet connection. A store is an alternative if you prefer in-person service or need help scanning a paper document. The fax near me guide covers physical faxing locations.
Fax.Plus encrypts stored files using AES-256, with unique keys for each user. Protect access to your Outlook mailbox and Fax.Plus account, and verify the destination number before sending. Stored-file encryption does not make every email workflow appropriate for regulated information. HIPAA email faxing requires the separately configured Enterprise workflow described below.
HIPAA fax by email requires Enterprise, Advanced Security Controls, a signed Business Associate Agreement and administrator setup for provisioned users. This configured workflow uses @tls.fax.plus for protected health information, rather than the standard @fax.plus procedure above. Ordinary paid Email to Fax is not the HIPAA workflow. Contact your account administrator to confirm the compliant workflow before sending protected health information.
Outlook’s Rich Text message format can bundle attachments into an unsupported winmail.dat file. Change the message format to HTML or Plain Text, then reattach the original documents and resend. A supported RTF document attachment is different from Outlook’s Rich Text message format. If your organization controls these settings, ask your IT administrator to check the outgoing format.
Use another email account, fax from a computer, or prepare Word and PDF documents for sending.
Create your Fax.Plus account, choose a paid plan and enable Email to Fax. Send documents from Outlook and check delivery in your inbox.