Re: why I can't post?

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On Friday 23 December 2005 00:04, Hou Xiang ZHU wrote:
> This is a test because the previous two post send by me is not
> shown on this list!
>
> why?
> houxiang


At least some of the Redhat list servers use greylisting.  It 
appears, looking back through your posts to the list, that your ISP 
uses several different servers to deliver mail to the list.  For 
example, here is a list from 5 of your messages to the list showing 
which of your ISP's mail servers connected to which of Redhat's 
list servers:

fra-del-03.spheriq.net [195.46.51.99]) by mx1.redhat.com 
fra-del-01.spheriq.net [195.46.51.97]) by mx3.redhat.com
lon-del-03.spheriq.net [195.46.50.99]) by mx1.redhat.com
lon-del-03.spheriq.net [195.46.50.99]) by mx3.redhat.com
lon-del-02.spheriq.net [195.46.50.98]) by mx1.redhat.com

If your ISP uses a pool of servers to deliver mail where a different 
server can attempt to deliver mail each time a delivery is tried 
then greylisting can effectively block your messages until the same 
server at your ISP tries to deliver a second time to the same 
Redhat list server.  You would have to be able to see the logs at 
your ISP's above listed mail servers in order to be sure this is 
the problem though.

Greylisting does have a mechanism to allow mail to get through in 
this type of scenario but you'd have to discuss this with the 
Redhat mail server administrator(s).

Regards, Mike Klinke






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