Email filtering Using wildcards and Perl regular expressions
FortiGate Version 4.0 MR1 Administration Guide
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Block purposely misspelled words
Spammers often insert other characters between the letters of a word to fool spam
blocking software.
/^.*v.*i.*a.*g.*r.*o.*$/i
/cr[eéèêë][\+\-\*=<>\.\,;!\?%&§@\^°\$£€\{\}()\[\]\|\\_01]dit/i
Block common spam phrases
The following phrases are some examples of common phrases found in spam messages.
/try it for free/i
/student loans/i
/you’re already approved/i
/special[\+\-\*=<>\.\,;!\?%&~#§@\^°\$£€\{\}()\[\]\|\\_1]offer/i
Figure 355: MMS Message Flood
Figure 356: MMS Duplicate Message
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