[Mailman-Users] how to active a maillist

[Tonny Liu]

Hi,I'm a newer to maillist and mailman, I used qmail as MTA,I created a user list named spt, and add two users to this list. In the welcome letter, a user was told he  can use [EMAIL PROTECTED] to post his mail,but was told that [EMAIL PROTECTED] is a illegal email address.   Can anybody told me why,thanks in advance.       Tonny.