Hi, I am using SOPHOS UTM 9 ASG software model. can some share the steps to configure settings and have gateway send notification to a target address. without External smtp server?

We use a Model: ASG220 Firmware version: 9.352-6 Since a view days the Executive Report does not show images, but the picture shown is for example: var/rrd-nodataimages/cpuusage_nodata.png (see below) What is wrong?