[Mailman-Users] I can't get "Welcom" msg.

[Xiao Bing]

I have installed Mailman in my RedHat6.2 OS.I sent a subscription to the maillist with a testing email account.
Then I receive a msg like "Listname-- confirmation of subscription -- request 770815".
I reply the msg according to it's confirmation rules.
But I can't get a response msg like "Welcome to the ListName mailing list!"
What 's the matter?Anyone can help me?
                                                            Jack



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