All my recent posts to the list have been rejected with this message:
This is the Postfix program at host shockwave.systems.pipex.net.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can
delete your own text from the message returned below.
The Postfix program
<[EMAIL PROTECTED]>: host mx1.redhat.com[66.187.233.31] said: 550 5.0.0
<[EMAIL PROTECTED]>... You msut use a valid mail server
My postmaster says that he has asked redhat for an explanation, but I assume
none has been given yet. Does this mean that redhat considers my ISP is
running an open relay?
