hi,
open the file with the $content=file(...)-command; then do e.g.
$content=implode("$content",' ') to connect it to a string; use
eregi('<a href="mailto:[[:alpha:][:digit:].@_-]\">',$content,$array);
now the emails will be stored in $array[1], $array[2],...
you can throw away the a href-stuff using eregi_replace
that should work!
ben