Mail

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The firewall can be used as a secure mail relay (mail proxy). It receives the mails from outside, performs spam and virus checks and forwards the filtered mails to the internal mail server. If you manage several domains, you can forward the incoming emails to different mail servers.

 

Preconditions for the usage as mail relay

 

The following preconditions must be fulfilled to use the firewall as mail relay:

You have your own mail domain (e.g. example.com).
You have a mail server in your internal network to manage the boxes for the emails.
The MX record of your domain (the DNS record for the mail server of your domain) points to the external (public) IP address of your firewall. All emails sent to your domain are then forwarded to your firewall. After the spam and virus checks they are forwarded to your internal mail server.

 

The firewall ensures for outgoing emails that they only can be sent from authorized hosts.

 

ATTENTION: To check your mails for viruses and spam you must also start the SMTP Content Scanner in the module Services.

 

NOTE: If you do not have your own mail server but fetch your emails via POP3 from your provider, you can use the POP3 proxy which is also part of the firewall software.