[MM3-users] Moderator e-mails only going out once a day

Hi, I have just got done migrating from MM2 to MM3 and the users are experiencing issues with their moderated messages. After the message is sent, the moderator does not know about the message until the next day. I checked the maillogs and all those messages are being sent at the same time around midnight. I also noticed the messages are being sent from user@example.com, which I switched in /etc/mailman3/mailman.cfg to a generic e-mail address.

Is there a way to change those moderator e-mails to send right away? Does having user@example.com in the config affect that?

Thank you in advance, Joe