[otrs] Question about new ticket notification for ticket created by the agent from the Web Interface

Hello all, we are happily using OTRS 2.3.4. When a Customer send an email to an address associated with an OTRS Queue all the agent get their notification via mail, and this is fine. When an agent instead creates an e-mail ticket from the Web interface specifying the recipients, the email about new ticket is correctly sent to the recipients, but the agents are not automatically notified about the new ticket. Can I change this mode of operation? Thank you in advance. Regards, Luca