Chapter 4 FortiOS Carrier : MMS Security features : Sender notifications and logging : Logging and reporting
  
Logging and reporting
With each virus infection, or file block, a syslog message is generated. The format of this syslog message is similar to:
2005-09-22 19:15:47 deviceid=FGT5001ABCDEF1234 logid=0211060ABC type=virus subtype=infected level=warning src=10.1.2.3 dst=10.2.3.4 srcintf=port1 dstintf=port2 service=mm1 status=blocked from="<sending MSISDN>" to="<receiving MSISDN>” file="eicar.com.txt" virus="EICAR_TEST_FILE" msg="The file eicar.com.txt is infected with EICAR_TEST_FILE. ref http://www.fortinet.com/VirusEncyclopedia/search/encyclopediaSearch.do?method=quickSearchDirectly&virusName=EICAR_TEST_FILE”
Note that the from and to fields are samples and not real values.