The Kiwi syslog server strips any values contained inside the <> (example < value >) when emailing the alert that's coming from a Cisco ASA server.
Example
On the syslog console
2016-12-06 11:05:48 Local4.Warning 192.168.1.1 Dec 06 2016 11:08:04: %ASA-4-722051: Group<vpngroup> User <jones> IP <2.2.2.2> IPv4 Address <10.0.0.64> IPv6 address <::> assigned to session
when receiving the email
2016-12-06 11:05:48 Local4.Warning 192.168.1.1 Dec 06 2016 11:08:04: %ASA-4-722051: Group User IP IPv4 Address IPv6 address <::> assigned to session