email with attachement gives image size 0

[mlaudren]

Can you try to add a fake parameter in the url like timestamp.
http://user:pass@CAMERAIP/cgi-bin/snapshot.cgi?1&ts=randomnumber

If it worked 1 time, and then fail, maybe there is a caching issue. By adding a parameter that change in the url, it is consider as a new request and will not look in the cache if any.