[Mailman-Users] spooling question

[ap]

Hi, I'm new in mailman and I have the same problem, one list have a lot
mails with errors(xxxx at htamil.com), and mailman everytime is processing
that, so when I send new mail a list, this is very slow, but I dont know how
to erase an e-mail in waiting, I tried with mailq(I use postfix) and  tried
in /var/spool/ **  and I hadn't good luck, could you tell me where located
the e-mail tail is?