Fax from Gmail — Email to Fax
You can fax straight from Gmail using our email-to-fax feature — no Chrome extension and no Gmail add-on. You compose a normal message in Gmail, attach your document, and address it to an alias that encodes the destination fax number. Our inbound-email handler validates the sender and runs the same send pipeline the dashboard uses. The one prerequisite is on the operator side: email-to-fax only works when the operator has configured an inbound-email domain and secret, so confirm it is enabled on your deployment before you rely on it from Gmail.
Plan requirement
Faxing from Gmail via email-to-fax works on paid plans and enforces the same page quota and HIPAA rules as any send. It depends on the operator having set the inbound-email domain (INBOUND_FAX_DOMAIN) and webhook secret; when those are unset the feature no-ops regardless of plan.
How it works
Gmail sends your message to your mail provider, which forwards it to a secret-gated webhook the operator wired up. The alias you send to encodes the recipient number and is tied to your per-user secret, so it is not guessable. Before any dial, our sender-auth logic checks that the alias is real, that the message passed DMARC — which Gmail supports for its outbound mail — and that your Gmail From address is on your allowed-senders list. A message failing any check is dropped silently rather than bounced. A valid message then runs the shared gated pipeline, so BAA, quota, and number rules apply, and your Gmail attachment is normalized to a fax-ready PDF.
What you can do
- ✓Send a fax from Gmail by attaching a file and addressing it to your fax alias
- ✓Work in Gmail on desktop or the mobile app with no extension or add-on
- ✓Restrict sending to approved Gmail addresses via your allowed-senders list
- ✓Lean on Gmail's DMARC and your secret alias so spoofed mail is dropped
- ✓Run the same BAA, quota, and number gates as a dashboard send
- ✓Manage your alias and allowed senders at /dashboard/settings
Setup steps
- 1Confirm the operator has configured the inbound-email domain and secret, or the feature is off
- 2Open /dashboard/settings, note your alias, and add your Gmail address to allowed senders
- 3In Gmail, compose a new message to <alias>.<number>@ the configured inbound domain
- 4Attach the document as a PDF, image, or supported Office file
- 5Send from the Gmail address you added to allowed senders
- 6Confirm the fax in /dashboard/history, where quota and status are tracked
Example
# In Gmail
To: you-secret-alias.15551234567@fax.yourdomain.com
Subject: Signed form
Attach: signed-form.pdfGmail — FAQ
No. There is nothing to install in Gmail. Email-to-fax works because the conversion happens on our side after your mail provider forwards the message, so any Gmail — web or mobile — can send a fax by attaching a file and addressing it to your alias.
Gmail publishes and signs outbound mail so it passes DMARC, which is one of the three checks we require: a real alias, a DMARC pass, and a From address on your allowed-senders list. Because Gmail satisfies DMARC by default, the main thing to get right is adding the exact Gmail address you send from to your allowed senders.
Most often the operator has not enabled email-to-fax. The feature only runs when the deployment has configured the inbound-email domain and secret; with either unset the path no-ops. Confirm with your operator that email-to-fax is on, then check that your Gmail address is on the allowed-senders list.
Yes. A valid Gmail message runs the same gated pipeline as the compose form, so its pages count toward your monthly allowance and the BAA and provisioned-number gates apply. Reaching your plan's monthly page limit blocks further sends from Gmail with an upgrade prompt.
Build with the Gmail
API access and webhooks are included on the Business and Enterprise plans. Create a key at /dashboard/developers and start sending.
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