[Mailman-Users] The mailman doesn´t deliver mails to all the accounts

[Luigi Vellucci]

I have a RedHat Linux 7.3 with mailman 2.1.3, I installed in a tar.gz source and I have a list with 1200 accounts and when a sent a email to the list, this email didn´t arrive to some accounts including me, I checked the logs but I didn´t found any error, I use sendmail 8.12.
 
Can someboy help me please.
 
 
Thanks
 
Luigi