$ibx->{replyto} = ':list';
($arg, $link) = PublicInbox::Reply::mailto_arg_link($ibx, $hdr);
is_deeply($arg, $exp, '":list" works for centralized lists');
$ibx->{replyto} = ':list';
($arg, $link) = PublicInbox::Reply::mailto_arg_link($ibx, $hdr);
is_deeply($arg, $exp, '":list" works for centralized lists');