mFax – How to send a fax from email

Note: This feature will only work from an email address registered in the SWTPVoIP mFax system.

Addressing the Email

Using any mail client such as Outlook or Gmail, compose a message addressed to an 11 digit It is important to always include the full 11 digits for faxing any number in the US or Canada.

Including a Cover Page

If you have your cover page setting turned on, mFax will automatically take details from your email and populate it directly onto a cover page (how to turn this feature on/off). Email subject line will populate RE: field of the cover page. Body of email will populate the Comments field of the cover page.


When sending a fax from email you can attach multiple documents types (see below). You can attach a single document or multiple documents (varying formats is fine) and they will be rendered, converted to a faxable format, and sent to your destination fax number. Once your documents are attached, simply hit SEND. That’s it! We’ll take care of the rest.

Allowed Email Attachments:

  • Image Files (TIFF, GIF, PNG, JPEG)
  •  Adobe Acrobat Files (PDF)
  •  Microsoft Office Files (DOC, DOCX, XLSX, PPTX)
  •  Printer File Formats (PCL, EPS, PS)
  •  Text Files (TXT, RTF)

TIP: If you create a file using a scanner or print to file, always choose the option of black and white for the output.

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