Chris Norman said: -

> Would it be possible, therefore, that during spam DB rebuild, that the IP
address of 205.178.149.7 (which did not send to me directly)* could be added
or bumped in the grey list just in case?

Sure. It's possible. 

> Would this even be a good idea or would it buy us anything?

No. Nothing at all. This is the normal path for a "proper" email message to
take.

1       A friend sends an email from his PC [SenderIP] to you, via his ISP's
MTA

2       ISP's MTA [ISPA Relay] receives message, spools it to you

3       Your MTA [Me}] gets the message, delivers it to a local mailbox.

How's this any different from: -

> SenderIP --> ISP relay --> Me ?


Spam sent from a netbot takes exactly the same path. Thus, this is useless
in terms of distinguishing between them.

Having said that, mxGuard, for example, will do a DNSBL lookup on as many
intermediate hosts as you specify.

* Some DNSBL will actually penalise anyone who sends you a message directly,
since one isn't "supposed" to send SMTP from a dynamic IP address, for
example.


Kind regards,

William Stucke
ZAnet Internet Services (Pty) Ltd
[EMAIL PROTECTED]
083-308-0700 - WFS
011-460-0115 - Office
086-502-9444 - Fax
http://www.zanet.co.za



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