The feline mewed,
| I have the following line in a piece of spam:
|
| To opt out:
|
| And the following regexp with which to match it:
|
| * 3^0 \<opt[-_ ]?out:?\>
Leading backslash conundrum. If the first character in a procmailrc regexp is
a backslash, its only meaning is "end of whitespace, next character starts
regexp"; if you're trying to use it to mean "reverse the default magic status
of the next character," it won't do that. Your backslash is telling procmail
that the less-than sign is a literal in a regexp and isn't introducing a size
condition.
This would work:
* 3^0 \\<opt[-_ ]?out:?\>
but since we expect "\\" to match a literal backslash in the text, it is
highly counterintuitive. Most people handle it this way:
* 3^0 ()\<opt[-_ ]?out:?\>
The empty pair of parentheses makes sense to both procmail and humans.
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