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
