Access to the requested URL was blocked

While trying to access the URL:
/component/mailto/?tmpl=component&link=26a364644eec31c54e4ce0fab0dc25de9b706d9e
The content is blocked for the following condition:
(none)
Additional information:
(none)
This incident was logged with the following log identifier:
ZgYGXQj17NtdsP91t2iGzgAAABk
IT-Administrator:
edv@vulkaneifel.de