+ # newer Email::Simple allows header_raw, as does Email::MIME:
+ my $list_id = $simple->can('header_raw') ?
+ $simple->header_raw('List-Id') :
+ $simple->header('List-Id');
+ my $ibx;
+ if (defined $list_id && $list_id =~ /<[ \t]*(.+)?[ \t]*>/) {
+ $ibx = $config->lookup_list_id($1);
+ }
+ $ibx;