Three questions, the forum only collects post if I run the maillist.php via cron, I cant see this in the documentation, but is this correct... (how often should maillist "run"?)

Also each mail appears on the mailing list (mailman) with this at the top of the post (in the body), is this right, can I remove it and whats the best way...

Content-Type: text/plain;
> charset="utf-8"
> Content-Transfer-Encoding: 8bit
> Organization: My forum, my way!
> In-Reply-To:<4C2D30CC(dot)3000406(at)yingtong(dot)co(dot)uk>
> X-FUDforum: baed86535067eaeaa54616100754ae4b<65>
> Message-ID:<41(dot)4c2d311a(at)www(dot)waltersoon(dot)co(dot)uk>

Finally, is there a "preferred" way of stopping spam entering via the mailing list facility. Malman is"secure" and I want the forum to be members only to write but global veiwable. If spam gets into the pop mailbox will it get sucked into the forum???