A simple regular-expression extractor for internet e-mail addresses is (not fully RFC compliant, but will handle %99 of the addresses you see out there): 
while($data=~/([\w.-]+\@(?:[\w.-]\.)+\w+)/gcs){
  #e-mail address in $1
}

[download]

If I were use I'd consider using the Mail::Bulkmail module to do the sending. It is designed for doing mass-mailings like you describe.

In reply to Re: pattern matching and sendmail issues by lhoward
in thread pattern matching and sendmail issues by csorensen

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