InvictaWiz Customer Support martyn at
Tue Dec 2 07:37:37 GMT 2003

Why should homeworkers generate failures through the dial-up list?
If they send their email through their ISP's mail server, their email should not be treated any
different to an email from any other source as once it arrives at your server it will have come from
a "propper" MX'd mail server.

The dialup "problem" arises if the client is using a mailserver of their own on a dialup account
that does not have an MX record assigned. This is the reason for the existence of the list of dialup
ips as it used to be a common method for junk emailers to send out email.

I suspect your false positive problem is from mis-configuration somewhere on your own network, not
on the clients.

Martyn Routley
InvictaWiz - The Internet in Plain English, Guaranteed
martyn at
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-----Original Message-----
From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK]On
Behalf Of Ron Campbell
Sent: 01 December 2003 14:14
Subject: maps-rbl+

This is probably not of interest  to those who are not in

The MAPS-RBL+ list is actually the union of 4 separate lists (RBL, DUL,
RSS and OPS).

For details, see

  One of these - the "dial-up list" is probably our
main reason for SPAM "false positives" at the moment. This is usually
  down to people working from home via an ISP.   Is it possible
to configure MS to use only some of the individual MAPS-RBL+ lists ?

Or should we just give up on these lists and rely on SpamAssassin - all
the "false positives" which I have seen, have negative SA scores so it
is clearly getting these right. Of course, there will be other cases
which the lists get right and SA misses ?

             Thanks ...  Ron

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