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Subject: Re: Subscribers to cygwin mailing list can post regardless ofspam blocks
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From: Per Abrahamsen <abraham AT dina DOT kvl DOT dk>
Date: 27 Nov 2000 14:16:28 +0100
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"Charles S. Wilson" <cwilson AT ece DOT gatech DOT edu> writes:

> HE has caused mail.comcast, in addition to his own machine, to be added
> to the list -- his machine is added to the open-relay list, while
> mail.comcast is added to the 'smarthost exit point' list. 

The local ISP always attempt to relay a test message through their
customers machine, before accepting to relay mail from them.  If the
customers machine will relay the test messsage, the ISP mailhost will
not relay the customers mail.

They do this check in order to avoid being listed in ORBS.

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