How to Send a Secure Fax Directly From Microsoft Outlook

This guide provides direct instructions for sending and receiving secure faxes using your Microsoft Outlook account, eliminating the need for a physical fax machine or dedicated phone line.

Understanding the Security Risks of Standard Email

Email Vulnerabilities

While Microsoft Outlook is a powerful tool used by over 400 million people, standard email is not inherently secure for transmitting sensitive information. Email-based threats are rising, with a recent survey revealing that over 83% of UK IT leaders have reported at least one email-related security incident. These attacks often involve sophisticated phishing campaigns specifically targeting Microsoft 365 accounts, designed to steal login credentials and other valuable data. As these threats become more advanced, the fundamental security gaps in standard email become more pronounced.

• Lack of Guaranteed Encryption: Standard email messages are often transmitted in plain text, making them susceptible to interception during transit. This is a critical failure point, as a recent report showed that even after a breach, most healthcare organizations fail to configure their email encryption correctly.
• Authentication Issues: Malicious actors can easily spoof legitimate domains to launch convincing phishing attacks. A recent vulnerability in DoorDash’s systems, for example, could have allowed anyone to send official emails from the company’s servers. Implementing essential but not universal protocols like DKIM and DMARC is necessary to verify email authenticity and prevent impersonation.
• No Verifiable Audit Trail: Unlike fax, standard email lacks a legally recognized confirmation of delivery. This is a critical requirement for compliance in regulated industries like finance and healthcare, where a verifiable audit trail is non-negotiable for client contracts and KYC documents.

How Email-to-Fax Technology Secures Your Documents

Online fax services bridge these security gaps by converting an email into a secure fax transmission before it reaches the recipient. This modern approach to faxing has become a key tool for compliance, with top fintech firms relying on it for their most critical communications. These services add robust security layers that standard email lacks. For instance, platforms like iFax utilize 256-bit SSL encryption to protect data in transit, ensuring that sensitive documents are shielded from unauthorized access as they travel over the network.

How to Send a Fax Using Microsoft Outlook

Prerequisite: Activate an Online Fax Service

To enable the email-to-fax feature, you must first have an active account with an online fax provider. These services are responsible for the technical conversion of an email and its attachments into a traditional fax signal that can be received by a standard fax machine. Leading providers offer seamless integration with existing email clients, such as how to fax from Outlook using iFax. 

While different platforms will have variations in the process of sending a fax through Outlook, here are the general steps:

Sending Your Fax in 5 Steps

1. Compose a New Email: Open Microsoft Outlook and click New Email to begin.
2. Format the Recipient Address: In the To: field, enter the recipient’s fax number followed by the fax service’s domain. The format is [CountryCode][FaxNumber]@[FaxServiceProvider].com. For example: 12125551234@ifaxapp.com.
3. Create Your Cover Page: The email’s Subject line will become the subject on the fax cover page. The body of the email will serve as the cover page message. Leave the body blank if no cover page message is needed.
4. Attach Your Documents: Click the Attach File button and select the document(s) you wish to fax. Supported formats typically include PDF, DOC, DOCX, JPG, and PNG.
5. Send and Confirm: Click Send. The online fax service will process the email and transmit the fax. You will receive an email confirmation in your Outlook inbox once the transmission is successful or if it fails.

How to Receive and Manage Faxes in Outlook

The Inbound Fax Process

Receiving faxes is equally straightforward. When someone sends a fax to your dedicated online fax number, the service receives it, converts the document into a PDF file, and forwards it directly to your Outlook inbox as an email attachment. This process creates an automatic digital record of all communications, which is critical for traceability and compliance.

The need for this level of secure, auditable documentation is a key driver behind the projected growth of the global online fax market to $12.52 billion by 2031. By shifting fax workflows to the cloud, organizations can create consistent, trackable processes that integrate directly into applications like Outlook.

Modern Faxing vs. Traditional Methods

Using an email-to-fax service offers distinct advantages over legacy fax machines, particularly in security, compliance, and workflow efficiency.

Turn Your Inbox Into a Secure Document Hub

By pairing Microsoft Outlook with a secure online fax service, professionals can transform their inbox into a powerful and compliant tool for document transmission. This modern approach eliminates dependence on outdated hardware, reduces costs, and critically, enhances document security in an environment where email-based cyber threats are continually increasing. It is a vital step for any of the approximately 17% of businesses that still depend on faxing for their critical operations.