A subscriber can restrict access to his Mail2Fax service with some methods, those can also be combined:
- using a secret key that is only known to him, and is inserted in every mail that he sends to Sipwise C5 to be forwarded as fax
- using an access control list (ACL) that determines from which endpoint and for which destination a mail-to-fax is accepted by Sipwise C5 platform
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Secret Key: the secret key used to validate the sender of an e-mail; not used if left empty -
Secret Key Renew: secret key renewal period; Sipwise C5 platform will enforce renewal of the secret key when the defined time has elapsed -
Last Secret Key Modify Time: information about the last secret key modification time -
Secret Key Renew Notify: an e-mail address where the notification about secret key modification is sent -
ACL: access control list, see the details below; this is a list of access control rules
The parameters for access control rules:
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From email: this sender is allowed to use Mail2Fax service -
Received from IP: this IP address or host name must be present in From e-mail header -
Destination: either a complete phone number in E.164 format, or a regular expression ("Use Regex" checkbox must be ticked) that may define a range of numbers. Examples: "4313334445" as a single number; "^4399.+" as a regular expression: all destinations starting with "4399"
| caution | |
When neither Secret Key, nor ACL is defined then Mail2Fax service will deny accepting any e-mail for sending faxes! |