8. Faxserver Mail2Fax Configuration

Using Sipwise C5 Faxserver’s Mail2Fax service requires the configuration of Sipwise C5’s local mail server that is Exim. It has to be configured in a way that it can receive mails from outside of the server, because Exim by default listens only on the local interfaces for incoming mails.

Exim Configuration

The Sipwise C5 platform administrator must reconfigure Exim in order to enable receiving e-mails for fax sending:

sudoedit /etc/ngcp-config/config.yml  # edit section 'email:' according to your needs
sudo ngcpcfg apply 'adjust exim4 / MTA configuration'

PLEASE NOTE: When entering configuration data the following points must be kept in mind:

DNS Configuration

It is necessary to add a subdomain starting as mail2fax. to the list of domain names. That is where the faxes will be sent by users to trigger Mail2Fax service.


Alternatively, edit /etc/ngcp-config/templates/etc/exim4/conf.d/router/999_mail2fax.tt2 file and adjust it to your personal preferences. Although this is not recommended and should only be done by Sipwise support engineers.