Symantec Mail Security, Руководство администратора

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91 Configuring email filtering
Creating virus, spam, and compliance filter policies
Using Perl-compatible regular expressions in conditions
To use Perl-compatible regular expressions, click “matches regular expression”
or “does not match regular expression” for any of the conditions that offer you
that choice (the conditions in the first row of
Table 4-8 , plus the Message header
condition).
You can refine your search as described in Table 4-10 . To match certain special
characters, you must escape each with \ as shown in the table. For more
information about Perl-compatible regular expressions, see:
http://www.perl.com/doc/manual/html/pod/perlre.html
Ends with/does not
end with Equivalent to .*text$ wildcard test using matches exactly.
Matches exactly/
does not match
exactly Exact match for the supplied text (not available for the message
body).
Notes:
All text tests are case-insensitive.
Some tests are not available for some components.
Table 4-10 Sample Perl-compatible regular expressions
Character Description Example Sample matches
. Match any one character j.n jen, jon, j2n, j$n
jo.. john, josh, jo4#
.* Match zero or more
characters sara.* sara, sarah,
sarahjane,
saraabc%123
s.*m.* sm, sam, simone,
s321m$xyz
.+ Match one or more
characters sara.+ sarah, sarahjane,
saraabc%123
s.+m.+ simone, s321m$xyz
\. Match a period stop\. stop.
\* Match an asterisk b\*\* b**
\+ Match a plus character 18\+ 18+
Table 4-9 Filter tests (Continued)
Test type Description