Matching email addresses is difficult. But you're not
actually trying to validate them, so you can probably afford
to just "do your best", as it were :). This is the regexp
used in Pod::HTML for matching email addresses; it's not
going to catch everything, and it's probably going to
wrongly match some addresses. But it may help.
if ($word =~ /[\w.-]+\@\w+\.\w/) {
# looks like an e-mail address
This is used on an individual "word", where a word is
obtained by splitting a string on /\s+/. So that's one
example. If you look around a bit more, you can probably
find others.
For part 2 (sending the email)--if you're sending the same
content to each of the addresses, then you could perhaps
use Bcc to write all of the addresses to the message.
for my $addr (@mail_to) {
print SENDMAIL "Bcc: $addr\n";
}
print SENDMAIL "From: csorensen\@uptimeresources.net \n";
print SENDMAIL "Subject: South African tourism survey \n";
print SENDMAIL "Content-type: text/plain \n\n";
print SENDMAIL $content;