I tried all the basics with no resolution.
I talked to ISP and to web hosting/email hosting company. All their tests indicate it is not their issue.
I can run tracert on our domain from locations in Tampa and St. Pete, FL. and have it resolve but when trying to tracert on our network internally will NOT resolve.
Reset the Brighthouse cable modem and the Linksys router.
Tried different ports on both the modem and the router.
Tried different DNS servers.
Turned off all systems but one; turned that system off and tried another.
Users can get to the internet with IE and get to all desired websites but just can't get to our website/domain and our webmail. Can use Outlook and get email from Brighthouse email but not from our domain. I am at a loss of what else to try. Only thing I have accomplished it to be able to say the problem is definitely on our network somewhere and that everything was working fine on Wednesday and now on Monday, after Thanksgiving, email with Outlook or webmail is no longer working. HELP, please and thanks.