[Mailman-Users] why member's email is taken as No-memeber posting and put into pending?

[Eric Wang]

Hi There,

I got a problem here, 
I have couple member post only mailists, but I found there are some
member posted emails are put into pending also with the information
"Non-members are not allowed to post messages to this list.", so I am
wondring how this happened, and if there is a solution?

My system Qmail+Mailman2.0

Thanks, you guys!