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From: PerlFAQ Server on 20 Jun 2010 12:00
This is an excerpt from the latest version perlfaq9.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

9.22: How do I read mail?

While you could use the "Mail::Folder" module from CPAN (part of the
"MailFolder" package) or the "Mail::Internet" module from CPAN (part of
the "MailTools" package), often a module is overkill. Here's a mail
sorter.

#!/usr/bin/perl

my(@msgs, @sub);
my $msgno = -1;
$/ = ''; # paragraph reads
while (<>) {
if (/^From /m) {
/^Subject:\s*(?:Re:\s*)*(.*)/mi;
$sub[++$msgno] = lc($1) || '';
}
$msgs[$msgno] .= $_;
}
for my $i (sort { $sub[$a] cmp $sub[$b] || $a <=> $b } (0 .. $#msgs)) {
print $msgs[$i];
}

Or more succinctly,

#!/usr/bin/perl -n00
# bysub2 - awkish sort-by-subject
BEGIN { $msgno = -1 }
$sub[++$msgno] = (/^Subject:\s*(?:Re:\s*)*(.*)/mi)[0] if /^From/m;
$msg[$msgno] .= $_;
END { print @msg[ sort { $sub[$a] cmp $sub[$b] || $a <=> $b } (0 .. $#msg) ] }



--------------------------------------------------------------------

The perlfaq-workers, a group of volunteers, maintain the perlfaq. They
are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.

If you'd like to help maintain the perlfaq, see the details in
perlfaq.pod.
From: Chris Nehren on 21 Jun 2010 06:16
On 2010-06-20, PerlFAQ Server scribbled these curious markings:
> 9.22: How do I read mail?

*CRINGE*

*twitch*

At the very *least*, Email::Folder, please.

--
Thanks and best regards,
Chris Nehren
Unless noted, all content I post is CC-BY-SA.
From: brian d foy on 22 Jun 2010 22:58
In article <hvne5b$tdf$1(a)news.eternal-september.org>, Chris Nehren
<apeiron(a)isuckatdomains.net.invalid> wrote:

> On 2010-06-20, PerlFAQ Server scribbled these curious markings:
> > 9.22: How do I read mail?
>
> *CRINGE*
>
> *twitch*
>
> At the very *least*, Email::Folder, please.

patches welcome. :)
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