pfSense

The HTML created by the RRD Report Email package is listing the graphs as:

<img src="cid:WANGW-quality.rrd-8hour.png" />

but then the graph is attached like so in the email:

Content-Type: application/octet-stream; name="/tmp/WANGW-quality.rrd-8hour.png" 
Content-Transfer-Encoding: base64
Content-ID: <WANGW-quality.rrd-8hour.png>
Content-Disposition: inline; filename="/tmp/WANGW-quality.rrd-8hour.png" 

This causes email clients rendering email HTML inline to show broken images.

I attempted to reset the RRD database to see if this would fix the problem, it did not. After the RRD database was deleted I tried to delete the graph items from an individual email report. This did not fix the issue. Next I tried deleting the whole RRD Email Report itself and creating it from scratch. This too did not fix the issue.

Not sure if this is a problem with the RRD backend or the RRD Email Report package.