I have a customer that claims that her emails to our staff (with 
@[log in to unmask] and @[log in to unmask]) addresses are bounced.
She used to be able to email us all the time until about one week ago.
Everybody else can email us fine. We have a decent traffic of email on 
daily basis.

I am pretty convinced that the problem is particular to them. 
Nonetheless, I would like to have something more tangible to show them. 
I was wondering if I could find if they are being blocked from MSU. I 
remember in the past reading somewhere of IPs or blocks of IPs that 
would be blocked from MSU for security reasons. Is there a way of 
knowing what gets blocked from msu.edu?


-- 
Oscar Castaņeda
Remote Sensing & GIS
Michigan State University