Administrator's Guide - Kerio Software Archive

14.4 Email scanning
If only an asterisk is used for the specification, the rule will apply to any file
transmitted by HTTP or FTP.
The other two conditions can be applied only to HTTP:
• MIME type
— MIME types can be specified either by complete expressions (e.g. image/jpeg)
or using a wildcard matching (e.g. application/*).
• URL — URL of the object (e.g. www.kerio.com/img/logo.gif), a string specified
by a wildcard matching (e.g. *.exe) or a server name (e.g. www.kerio.com).
Server names represent any URL at a corresponding server (www.kerio.com/*).
If a MIME type or a URL is specified only by an asterisk, the rule will apply to any HTTP
object.
Action
Settings in this section define whether or not the object will be scanned.
If the Do not scan alternative is selected, antivirus control will not apply to transmission
of this object.
The new rule will be added after the rule which had been selected before
Add was clicked. You can use the arrow buttons on the right to move the rule within the list.
Checking the box next to the rule can be used to disable the rule. Rules can be disabled
temporarily so that it is not necessary to remove rules and create identical ones later.
If the object does not match with any rule, it will be scanned automatically. If only selected
object types are to be scanned, a rule disabling scanning of any URL or MIME type must be
added to the end of the list (the Skip all other files rule is predefined for this purpose).
14.4 Email scanning
SMTP and POP3 protocols scanning settings are defined through this tab. If scanning is enabled
for at least one of these protocols, all attachments of transmitted messages are scanned.
Individual attachments of transmitted messages are saved in a temporary directory on the
local disk. When downloaded completely, the files are scanned for viruses. If no virus is
found, the attachment is added to the message again. If a virus is detected, the attachment is
replaced by a notice informing about the virus found.
Note: Warning messages can also be sent to specified email addresses (e.g. to network
administrators) when a virus is detected. For details, refer to chapter 19.4.
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