> In that case couldn't you send it to the LISTSERV command address, or
> is that where you're sending them?  Even if LISTSERV ignores it, you've
> still confirmed your monitoring (i.e. no bounce messages).  OTOH if
> you're attempting to ascertain whether LISTSERV itself is going to
> answer more meaningful queries, MailCheck won't help you there either
> because (presumably) it's not wanting a response from anything other
> than the mail system.

That should work, but in the meantime they've fixed the problem.

> On the whole, I think MailCheck and LISTSERV aren't going to be
> functionally compatible.

Why?