FortiMail is configured by default to send the email report with the 'from address' as 'postmaster@localdomainname'.Solution
This article shows how to modify the 'from address'.
In this example the local domain on the FortiMail is dom1b.com.
When a report is generated it will be delivered to notification email address with a 'from address' of 'firstname.lastname@example.org'.
The 'from address' can be modified to use 'email@example.com' by making changes to the 'Email history report template' as shown below.
In GUI, go to System > Customization > Custom Email Template > To edit a template, double-click it or select it and click Edit.
Select 'email history report'.
Once these changes are applied the generated report will now be delivered with from 'firstname.lastname@example.org'.