In this page you find:
This page contains configuration options for the spamassassin mail filter and how it should manage the e-mails recognised as spam.
On this page, by ticking the appropriate checkboxes, a few global configuration settings of the POP3 proxy can be enabled.
Enable the POP3 e-mail scanner on the GREEN, BLUE, and ORANGE zone, respectively. They appear only if the corresponding zones are enabled.
Activate the virus scanner.
Enable spam filtering on the e-mails.
When the checkbox is ticked, also connections over SSL/TLS are scanned for virus.
Let all the outgoing connections be logged by the firewall.
This page allows to configure how the POP3 proxy should proceed when it finds a spam e-mail.
Note
Even when an email has been marked as spam, it will be delivered to the original recipient. Indeed, not delivering it would break RFC 2821, which states that once an email is accepted, it must be delivered to the recipient.
The prefix that will be added to the subject of the e-mail recognised as spam.
Tick the checkbox to replace, in each spam e-mail, the body of the original e-mail with a report of the spamassassin daemon with about the reasons why the e-mail had been marked as spam.
The number of hits required for a message to be considered as spam.
Tick this checkbox to activates support for Japanese character sets in e-mails to search for Japanese spam.
Tick the checkbox to process spam e-mails using pyzor (in short, spam e-mails are converted to a unique digest message that can be used to identify further analogous spam e-mails).
Warning
The activation of this option might considerably slow down the POP3 proxy!
A list of e-mail addresses or whole domains, specified using wildcards, one per line. E-mails sent from these addresses and domains will never be checked for spam.
A list of e-mail addresses or whole domains, specified using wildcards, one per line. E-mails sent from these addresses and domains will always be marked as spam.
Note
To wildcard a whole domain use the following syntax: *@example.com
The settings can be saved by clicking on the Save Button.
Encrypted e-mails.
The Endian UTM Appliance is unable to scan the e-mails sent through a POP3 SSL connection since it is an encrypted channel.
Therefore, to allow a client to use POP3 over SSL it is necessary to appropriately configuring it and to disable the encryption from the client to the Endian UTM Appliance. Encryption should be disabled (i.e., do not use SSL), but the port for POP3 traffic in plain text changed from the default 110 to 995.
After setting this configuration, the connection from the client to the Endian UTM Appliance will remain in plain text, but it will use port 995, making the Endian UTM Appliance setup an encrypted POP3 over SSL connection from it to the POP3 server.