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A simple regex that seems to always work for me for pulling the 'real' address out is this:
$from = $1 if $from =~ /<(\S+)>/;
If $from was "Usern name", you'd wind up with ''. If $from was just '', it still would be since the regex wouldn't match.

As far as the problems of folding and multiple addresses in a field that jlongino pointed out, I think MIME::Head does a good job of taking care of the messiness of that for you. I have a script that used to do a lot of that manually, but I was always tweaking it for special cases that I'd never thought of. For example, addresses like "Name, User" <user@whatever> threw off my parsing of multiples because of the commas. And I started out thinking I only had to handle folding (wrapping onto multiple lines) for Subjects, but have now seen it in every header you mentioned, even the From header (The person had a very long user name in quotes). The perldoc is very long, but take a look at the 'get' and the 'unfold' methods to handle the problems of getting multiples and folding.

In reply to Re: Decode a mail with MIME::Parser by blahblahblah
in thread Decode a mail with MIME::Parser by RuneK

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