Reading E-mail Via the Web

How to write your own program to read and send mail to any server on the Internet.
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extracting the headers with

Anonymous's picture

I am trying to extract the subject line from emails and your article is helping me.

What does the "w-" do in the regular expression "m/^([w-]+):/i)" ?
It's just above the heading "Handling HTML".

Is it supposed to match a character class consisting of "w" and "-" ? I would think something like "s" would be used to match leading whitespace.

Thanks