Avira antivir exchange User Manual
Anti-spam
125
Emails are encrypted or signed
Encrypted and/or signed emails. At
present, spammers do not send encrypted
or signed emails.
present, spammers do not send encrypted
or signed emails.
Microsoft Exchange "No-Spam" SCL Value
See also
See also
Spam Confidence Level (SCL), Spam Filter
(Intelligent Message Filter (IMF) Exchange
2003 and higher. SCL can accept integers
(Intelligent Message Filter (IMF) Exchange
2003 and higher. SCL can accept integers
between -1 and 9. -1 is assigned by
Exchange for emails from senders in the
same Exchange organization. This value is
evaluated by the Wall Spam filtering job as
a definite “no spam” criterion.
Exchange for emails from senders in the
same Exchange organization. This value is
evaluated by the Wall Spam filtering job as
a definite “no spam” criterion.
7.2.3 Definite spam criteria
Likewise, the following exclusion criteria can be defined to ensure that an email is always
filtered and intercepted if necessary.
Criterion
Description
Emails from the
following senders
(Blacklist)
following senders
(Blacklist)
Blacklist: Addresses from all senders who are always
identified as spam senders. The default configuration already
contains a list of known addresses. You can define additional
identified as spam senders. The default configuration already
contains a list of known addresses. You can define additional
addresses of your own.
Emails with this
character set
character set
This function checks the “charset” field in the email headers
for character sets contained in the specified list. Emails using
for character sets contained in the specified list. Emails using
such character sets are immediately classified as spam.
Exchange
SenderIDResult = "FAIL"
You will find more
information about the
SenderID under
You will find more
information about the
SenderID under
Details: SenderID
If you enable this criterion, the sender ID of the email is also
evaluated. This prevents "spoofing" in other words the
falsification of sender mail address domains. Evaluation is
evaluated. This prevents "spoofing" in other words the
falsification of sender mail address domains. Evaluation is
based on entries in a DNS. This DNS can be used to
determine from which IP addresses emails from particular
domains can/cannot be sent. The result of the sender ID is
supplied with the email. Wall checks the sender ID of the
email and evaluates the result "FAIL" as spam. To be able to
determine from which IP addresses emails from particular
domains can/cannot be sent. The result of the sender ID is
supplied with the email. Wall checks the sender ID of the
email and evaluates the result "FAIL" as spam. To be able to
use the SenderID function you must enable a number of
functions on the server, e.g. the associated filters for
SenderID on the server. These are enabled under
functions on the server, e.g. the associated filters for
SenderID on the server. These are enabled under
Server -
Logs - SMTP - Properties in the Identification field. In
addition, both server and client (Outlook) must be
configured.
configured.
Note: If emails are only to be deleted directly when they are definitely identified as SPAM, you
must set the
must set the
Spam probability for High to 100 percent and define a corresponding action.
This ensures that only the emails in which the definite criteria (= the black list of character set)
have clearly identified SPAM come under this category. With a setting of 91 to 100, for example,
emails with a high spam probability from other criteria also come under this category.
have clearly identified SPAM come under this category. With a setting of 91 to 100, for example,
emails with a high spam probability from other criteria also come under this category.