We have users with outlook use SpamSource by Daedalus Software, LLC to report spam. "SpamSource is an Spam Reporting addin for Microsoft Outlook 2003/2007/2010/2013/2016. SpamSource helps collect information from messages for use in reporting unsolicited junk email. Collects SMTP headers and email body source. Copy information to the Windows clipboard or email to specified recipients. "
We have it set up to deliver reported spam to a special email account we setup. The beauty of it is its easy to use. It puts a "Report Spam" button on the tool bar. All the customer has to do is press the button and we get a email with the full headers and the body source for review. This gives us all the info to adjust the spam filters as needed or report the spam.
If we had the same thing in WebMail this would be great.
Junk Email filtered ISP