How are they attempting to access their email (webmail, thunderbird, phone)? 
Could you provide any other details or error messages related to the issue?

Sent from a tiny keyboard. 

On Jul 2, 2015, at 4:37 PM, Joseph V. Bolton Jr. <[log in to unmask]> wrote:

Some of my colleagues are unable to access email.    Any help would be appreciated. 



Joe Bolton