Fax Subject Line Commands for Email to Fax
Change how each fax is sent, right from your email subject line. Add a cover page, send in high resolution, schedule a fax for later or send it encrypted. No settings to change and nothing to install.
What are fax subject line commands?
Fax subject line commands are short codes you add to the subject line of an email to fax. Each one changes how that fax is sent. Put the command at the start of the subject line, or at the end, with a space between it and your text. Use them to add a cover page, send in high resolution, schedule or encrypt a fax.
Email to fax subject line commands
Type the command, a space, then your usual subject. For example: /hq Signed contract. Commands only apply to the fax in that email. You can use more than one command, in any order. For example: /hq /b Referral for patient.
| Command | What it does | Example subject line |
|---|---|---|
| /b | Sends the body of your email as the first page of the fax, like a cover page. | /b Referral for patient |
| /a | Stops the email body being sent for this fax, if you have set it to always send. | /a Invoice 1042 |
| /hq | Sends in high resolution, for fine print, signatures or detailed images. Costs 25% extra per page. | /hq Signed contract |
| /lq | Sends in standard resolution, if you have set high resolution to always on. | /lq Order form |
| /d | Schedules the fax for a later date and time. Type the month first, then the day, year and time. | /d 11/28/2026 16:30 |
| /number | Sends the fax encrypted. Add the fax number after the command and send to fax@secure.gofax.com.au. | /number 0388889998 |
How to schedule a fax from email
Create a new email to the fax number followed by @send.gofax.com.au.
In the subject line, type /d, then the date and time. For example: /d 11/28/2026 16:30, or /d 11/28/2026 04:30PM. The month comes first.
Attach your document and press send.
Your fax shows in your send queue as scheduled until it goes out. GoFax uses the time zone set in your account, so check it in your settings before you schedule.
How to send an encrypted fax from email
Create a new email to fax@secure.gofax.com.au (not the usual @send.gofax.com.au address).
In the subject line, type /number, a space, then the fax number. For example: /number 0388889998.
Attach your document and press send.
Your data is encrypted in transit and at rest, with optional data sovereignty to keep it all in Australia. Before your first encrypted fax, your IT team needs to set up S/MIME email encryption with GoFax.
Turn a command on for every fax
If you use the same command on most faxes, set it once in your account. In your send settings, you can set the email body or high resolution to always on. Then use /a or /lq to switch it off for a single fax.
Email to fax send settings
These settings apply to every fax sent from email, including faxes sent from a mail server or business software. Manage them in your send settings.
| Setting | What you can do |
|---|---|
| Fax address | Send to the fax number followed by @send.gofax.com.au, for example 0388889998@send.gofax.com.au. GoFax removes brackets, plus signs, dashes, apostrophes and backslashes. |
| Allowed senders | Only email addresses on your allowed sender list can send. Add as many as you need, or add *@yourbusiness.com.au to cover your whole team. |
| Sender ID (CSID) | Give each allowed sender its own Sender ID. Numbers only, under 20 characters. |
| Sender fax header | Give each allowed sender its own fax header. Letters and numbers, under 100 characters. |
| Account fax header | Add the recipient's fax number, the page count or a time stamp to the header of every fax. |
| Attachments | Attach one or more files. They are sent in the order you attach them, as one fax. |
| Email body | Send the email body as the first page of every fax, or only when you use /b. |
| Resolution | Send every fax in standard or high resolution. High resolution costs 25% extra per page. |
| Default area code | Add an area code such as 07 or 02 automatically when a number is typed without one. |
| Maximum page rate | Set the most you will pay per page, so no fax costs more than you expect. |
| Delivery reports | Get an email when a fax succeeds or fails. You can attach the original document and add the original subject. Reports are also available through the API. |
You can also turn on low credit alerts and automatic credit top up, so faxes keep sending. Building your own integration? See the GoFax fax API.
Fax subject line command FAQs
Short codes you add to the subject line of an email to fax. Each one changes how that fax is sent, such as adding a cover page, sending in high resolution, scheduling or encrypting it.
At the start of the subject line followed by a space, or at the end with a space before the slash. For example: /hq Signed contract.
Yes. Use as many as you need, in any order. For example: /hq /b Referral for patient.
No. The subject line, including any command, is not included in the fax.
Type /d, then the date and time, in the subject line. For example: /d 11/28/2026 16:30. Put the month first. The fax waits in your send queue until then.
The time zone set in your GoFax account. Check it in your settings before you schedule, so your fax goes out when you expect.
Send your email to fax@secure.gofax.com.au and type /number, then the fax number, in the subject line. For example: /number 0388889998. S/MIME email encryption must be set up on your account first.
Yes. High resolution costs 25% extra per page. Use it for fine print, signatures or detailed images.
Yes. In your send settings, set the email body or high resolution to always on. Then use /a or /lq to switch it off for one fax.
Start faxing from your email
Create your GoFax account, buy send credits and add your email as an allowed sender. Our Australian team is here if you need a hand.