[Zope] Excluded from Zope mailing lists

Since a few days, I no longer receive posts from Zope's mailing lists. I expect this to be an interaction between some misconfiguration of the mail server responsible for Zope's mailing lists and a very effective spam filter of my ISP. This spam filter refuses to accept messages that are not MIME compliant (e.g. do not have a valid "Message-Id" header) or come from unknown mail servers (mail servers without or with apparently forged DNS entries). I would really be sad when I could no longer participate in Zope discussions because of this problem. Hope that Zope's mail servers will soon stop again to look like spammer tools. -- Dieter