Page 55 - Mercury Manual.book

Content Control 50
Editing a Content Control definition

The "Actions" Page On this page, you define what you want to happen to messages when
they pass through the content control system. You can add headers to the message (which can
later be detected by your filtering rules), and you can also choose other actions such as mov-
ing the message to a folder, forwarding it to another address, or deleting it.

The General Page
The settings on this page allow you to change the name that appears next to the definition in
the list of definitions, and to define the types of mail to which the set should be applied.

Name for this content control definition Whatever you enter in this field is the name Mercury
will use to identify this definition in the list shown in the Content control dialog. You can use
any name you wish up to 50 characters in length.

Apply this definition to mail originating from Allows you to choose what type of message
this set should apply to. Any source will apply the definition to any mail passing through the
It is currently a restriction queue; Local addresses only will apply the definition if the sender of the message has a local
of the MercuryD POP3 cli- address (one with no domain part); and Non-local addresses only applies the definition to any
ent that all mail handled by
it will appear to be “Local” mail where the sender's address is not local (i.e, the address does contain a domain part).
for purposes of content
control.
The Exceptions Page
Use this page to create Blacklists, which identify senders whose mail should always be re-
garded as unacceptable, and Whitelists, which identify senders from whom you always want
to accept mail. For Pegasus Mail users, Blacklists and Whitelists are normally just regular
Pegasus Mail distribution lists, which means that you can easily manipulate them using fil-
tering rules, and with the right-click options Add sender to mailing list and Remove sender
from mailing list while you are reading a message or browsing the contents of a folder. It is
also possible to share system-wide Blacklists and Whitelists by putting them in a shared di-
rectory then entering the path to that directory in this window.

Mail matched by a black- Blacklist file Enter in this field the name of a file in which Mercury should check for ad-
list is assigned a weight of dresses and domains from which mail should always be regarded as unacceptable. The file
9999, while mail matched
by a whitelist is assigned a need not exist already. Once you have entered the filename, you can edit the file by clicking
weight of -9999. the edit button next to the field. Within the blacklist file, you can use asterisks as wildcard
characters to match entire domains or parts of domains: so, if you want to block all users from
the domain spam.com, you would enter *@spam.com. Similarly, to block all mail from any
user on any machine within the spam.com domain group, you would enter *@*.spam.com.

Whitelist file Enter in this field the name of a file in which Mercury should check for ad-
dresses and domains from which mail should never be regarded as unacceptable. The file
need not exist already. Once you have entered the filename, you can edit the file by clicking
the edit button next to the field. You can use the same type of wildcard operations described
for the blacklist file within the whitelist.

The Message Tests Page

Use this page to maintain a set of rules that should be applied to mail messages that are not
covered by either a whitelist or blacklist. The rules allow you to perform comprehensive tests
on the actual content of the message, and can be linked together to create chains of tests. Each
rule can have a weight, and after all the rules have been applied, Mercury adds up the com-
bined weights of all the rules that matched the message: if the combined weight is greater than
a value you specify, the message is marked as acceptable.

Content processing rules file Enter in this field the name of a file containing rules written
using the Pegasus Mail/Mercury content control filtering language (see below) - Mercury will