FortiMail supports the following match operator modifiers:
/m
Treat the string as multiple lines in the format /<string>/m.
/<string>/m
/s
Treat the string as a single line.
/x
Ignore the white spaces in the expression in the format /xxx/x.
/xxx/x
For example, /a b c/x will also match abc.
/a b c/x
abc
