Email to fax

InterFAX allows you to send faxes from any standard email client, such as Outlook or Thunderbird, via web based email services such as Gmail or Yahoo! Mail, or via 3rd party applications such as Salesforce.

If you want to broadcast to multiple recipients see Contact lists.

Verify your allowed senders. In order to link your email address with your InterFAX user, the email address you would like use to submit faxes from needs to be an Allowed Sender in your settings.

The email address you used to register with InterFAX is automatically added as an allowed sender; however, any number of allowed senders can be added through your account. See Outbound settings for more information.
Compose an email and verify the destination number.

On a basic level, in order to fax from email, start by opening a new mail message and in the To: field of your email, simply enter the correctly formatted fax number followed by the extension ‘@fax.tc’.

The extension ‘@fax.tc’ allows the submission to access our servers; however, the fax number itself can be formatted in a number of ways depending on where the fax is being sent from, as well as its destination. For further information regarding the correct formatting of fax numbers, see Fax number formats.
Add your message and/or attachments. There are a number of options for adding content to be faxed:
- Enter the content to be faxed into the message body directly.
- Attach standard files such as ‘.DOC’ or ‘.PDF’, without text in the email body. Attachments are faxed in their order of attachment. For a complete list of supported file types, see Supported file types.
- Fax both the email body text and attachment(s).
- Type your text, attach your document(s) and add /b (forward-slash b) to the end of the email subject line to include the email body text as a first (cover) page.
- Add /CP:coverpagename to the email subject line to include the named cover page with the submission.
  
  Note: This will override any default cover page the sending user has assigned. If the coverpagename does not exist, or is not accessible to the sending user, the submission will fail.
- Add /nocp to the email subject line to prevent a cover page from being included
  
  Note: This will override any default cover page the sending user has assigned
Click Send to send your fax. Once you click Send, your email is sent to InterFAX where it is automatically converted into a faxable format and sent to the destination number specified.

Outgoing faxes you have sent by email look just like regular mail items in your sent items and you can receive confirmation email messages with the success/failure status of the fax transmission.

Additionally, you can log in to InterFAX and view your outgoing fax queue.
Log in to InterFAX and click Outbound Faxes in the Navigation Menu to follow the progress of your fax. This will show a list of all sending and sent messages, the details of each transmission, and advanced options for individual messages.

Send a fax to a contact list

Using InterFAX’s Contact Lists options, users can broadcast faxes to lists of contacts in single transactions, rather than sending individual transactions one at a time.

Tip: Before running any fax broadcast to multiple recipients, we recommend sending a single recipient test to verify that your settings are correct.

Verify your allowed senders. In order to link your email address with your InterFAX user, the email address you would like use to submit faxes from needs to be an allowed sender in your settings.

The email address you used to register with InterFAX is automatically added as an allowed sender; however, any number of allowed senders can be added through your account. See Outbound settings for more information.
Create a contact list. See Contact lists for more information.
In the To: field of your email enter list=LISTNAME@fax.tc where “LISTNAME” is the name of the contact list you want to send to.
Add your message and/or attachments.
Click Send. Once the individual transactions have been completed, you will receive a concentrated report with the status of your broadcast.

Advanced modifiers

Subject line modifiers | Sending attachments | Password authentication

Subject line modifiers

The following modifiers may be added to the end of the email’s Subject line to modify InterFAX’s behavior.

Modifier	Description	Usage
/b	Attachment Indicator – Forces transmission of message body when both an attachment and an email body are present. The default behavior is set through account preferences.	[Subject] /b See Sending Attachments
/bn	Attachment Negative Indicator – Negates transmission of body when “Always include message body” is selected in account preferences.	[Subject] /bn
/bb	Send only email body – Suppresses transmission of any attachments.	[Subject] /bb
/ib	Specifies to include the background colors and images in an HTML document.	[Subject] /ib
/h	Header Indicator – Specifies to use a header in the outgoing fax. The header string follows (see account preferences for header string syntax).	[Subject] /h {header string}
/hn	Header Negative Indicator – Negates usage of a header in the outgoing fax when a fax header is defined in account preferences .	[Subject] /hn
/d	Defer transmission to a later time and (optionally) date Default: Send immediately	[Subject] /d yyyy-mm-dd hh:mm
/fonttype	Specifies the font to be used in a text document. The list of acceptable fonts is visible in the account’s outgoing preferences. This setting has no effect on document types which internally indicate font types, such as Word and HTML.	[Subject] /fonttype {font name}
/fontsize	Specifies the font size to be used in a text document. This setting has no effect on document types which internally indicate font sizes, such as Word and HTML.	[Subject] /fontsize {font size}
/rs/rf	Resolution – sets the rendering resolution of the document – standard or fine. Default: As defined in user sending preferences, usually standard Note: Do not use more than one of these modifiers at a time.	[Subject] /rs[Subject] /rf
/gs/mono	Rendering optimized for greyscale (gs) or monochrome (mono) Default: As defined in user sending preferences, usually greyscale Note: Do not use more than one of these modifiers at a time	[Subject] /gs[Subject] /mono
/Landscape/Portrait	Page Orientation for printing HTML/URL files, or other documents which do not include orientation. Default: As defined in user sending preferences, usually Portrait Note: Do not use more than one of these modifiers at a time	[Subject] /Landscape[Subject] /Portrait
/A4/Letter/Legal/B4	Page size. Default: As defined in user sending preferences, usually A4 for subscribers outside the US, Letter for US subscribers. Note: Do not use more than one of these modifiers at a time	[Subject] /A4[Subject] /Letter[Subject] /Legal[Subject] /B4
/at	Number of transmission attempts to perform, in case of fax transmission failure. Legal values: 1 – 10 Default: 4, or as defined in sending preferences	[Subject] /at 5 will make up to 5 attempts
/rti	Minimum retry interval in minutes, i.e. the duration that the system will wait after a failed transmission attempt before performing a subsequent attempt. Legal values: 1 – 30 Default: 3, or as defined in sending preferences	[Subject] /rti 2 will wait at least 2 minutes between attempts

Note: Modifiers may be combined like:[Subject] /b /d 2002-01-01 18:01 /rs /Legal

Sending attachments

Several document attachments may be faxed in one message. The following table lists the resulting output, depending on usage of the /b and /bn modifiers.

Email Contents	/b present	/b missing	“Always include message body” option selected, /bn present	“Always include message body” option selected, /bn missing
Message Body Only	Message Body	Message Body	Message Body	Message Body
Attachment Only	Attachment	Attachment	Attachment	Attachment and a blank page
Message Body and Attachment	Both	Attachment Only	Attachment Only	Both

See Supported file types for information about supported attachment types.

Password authentication

Users who wish to apply an additional level of security to their faxing may elect to send their password with each outgoing email. This will offer another layer of identification in addition to the standard From header used by InterFAX to identify its users.

First, you will need to set this requirement in your user account. After logging in to your account, go to My Settings > Outgoing Options > Allowed Emails > Authentication. Check the Authenticate sender by password check box.

Now, each time you send an email, add your password somewhere in the message body in the following format: !#password. For example, !#123452.

This entry will be automatically stripped from the outgoing fax. Should the password be missing or incorrect – the fax will not be sent.