I could hardly believe it, too.
Maybe there is another reason for this blocking, but deleting the cookies helps on all clients, no matter if it is IE oder Firefox. Think I´m not skilled enough to find this real error. Hopefully it is not a virus, my scanner tells me nothing about it.
It is not only HFS blocked but also e.g. "
http://localhost:(Port)" on the server and all clients, that were connected with smartermail webmail before untill the cookies of smartermail are wiped out. I already made a post in smartermail forum, maybe someone better skilled than me reads it...
By the way: If e.g Firefox is "clean", HFS works even if I´m logged into smartermail via IE same time.
If I can send you information that could help you get behind that, please tell me.
thank you in advance
Ronny