How to Fax an Email Attachment from Your iPhone

Got a form by email and the office wants it by fax? Send the attachment from iPhone Mail or Gmail straight to the FaxUp app or faxup.net, without printing it.

By Dan BayerLast updated:

To fax an email attachment from an iPhone, share the attachment from Mail to the FaxUp app (or save it to Files and pick it on faxup.net/send in Safari), enter the fax number and send. No printer and no forwarding needed.

A common situation: an insurer, clinic or HR office emails you a form and asks for it back by fax. The attachment is already on your iPhone, so the fax is a few taps away. You don't need a printer, and you don't need to forward anything.

From Apple Mail to the FaxUp app

  1. Open the email in Mail.
  2. Touch and hold the attachment and tap Share. Apple's Mail lists Share next to Save to Files and Save Image.
  3. Choose FaxUp. The app accepts PDFs and photos shared from other apps.
  4. In FaxUp, check the pages. If the form needs your details or a signature, add them with Fill & Sign.
  5. Enter the fax number given in the email or on the form, add a cover page, and send.

From Mail to Safari, no app

  1. In Mail, touch and hold the attachment and choose Save to Files.
  2. Open faxup.net/send in Safari, tap to add a file, choose Choose Files and pick the saved file.
  3. Check the preview, enter the number and send.

Gmail, Outlook and other mail apps

Every mail app on the iPhone has a way to open an attachment and share or save it. Share it to FaxUp, or save it to Files and pick it in Safari as above. The rest of the steps are the same.

Things to check before you send

  • Is it the form, or a link to it? Some "attachments" are links to a portal. Download the PDF first; a fax can only carry the pages you add.
  • Only the pages they need: if the attachment includes instruction pages the office didn't ask for, read the form's instructions on what to send and remove the rest in organize PDF.
  • A signature that counts: a drawn or typed signature is fine for many offices but not all. The IRS, for example, wants ink on paper for Forms 2848 and 8821 sent by fax. See signing and faxing from an iPhone.
  • The reply route: put your name, phone or email and the office's reference number on a cover page. The free cover sheet maker makes one, or add it in the send flow.

The email's own text

Only the files you add are faxed, not the message body. If the recipient needs what the email said, copy the key lines into the cover page message.

Questions

Can I forward an email to a fax number?

Not with FaxUp: there is no email-to-fax address. Share the attachment to the FaxUp app, or upload it on faxup.net/send. That way you see every page before it is sent.

Will the email text be faxed too?

No, only the files you add. If the recipient needs the message, put it on a cover page: the send flow has a cover page with a subject and message box.

The attachment is in Gmail, not Apple Mail. Does it work?

Yes. Open the attachment in Gmail, use its share or download option to send it to FaxUp or save it to Files, then fax it from the app or from Safari.

Can I fill in the form before faxing it?

Yes. Use Fill & Sign in the FaxUp app, or the free fill and sign PDF tool on faxup.net. Apple Mail also has a form filling option for attachments, but then save the filled copy to Files before faxing it.

How do I prove I sent it?

With email notifications on in the FaxUp app, a delivered fax brings an email with a transmission report PDF: number, pages, time and a transmission reference.

Sources

Outside sources were checked on November 12, 2026. Something wrong or out of date? Email [email protected].