108003: Terminating ESMTP/ SMTP connection
Cisco ASA is a security device that provides the combined capabilities of a firewall, an antivirus, and an intrusion prevention system. It also facilitates virtual private network (VPN) connections. It helps to detect threats and stop attacks before they spread through the network.
Message: %ASA-2-108003: Terminating ESMTP/SMTP connection; malicious pattern detected in the mail address from source_interface:source_address/source_port to dest_interface:dest_address/dset_port . Data:string.
Event 108003 is generated when the ASA detects a malicious patern in an email address and has hence dropped the connection.
How could you resolve this situation?
This event does not require any action.