You did not indicate whether you are trying to block users from accessing the GMAIL website, or whether you are trying to block incoming email from user@gmail.com.
I will assume, like SachinGuring, that you want to block access to the gmail website.
I think there is an easier solution than the one he gave you:
Web Protection... Application Control...Application Control Rules (tab)... New Rule
Action = Block, Control By = Applications, Application = gmail, For=<designated user, group, or network object>
However, gmail is probably one of the lower-risk webmail sites, because I trust their spam filtering more than most others. If you want to block gmail, you might want to consider blocking the entire webfilter category of "Personal email"
Gmail for Business allows connections from Outlook. You may need to block additional ports, using firewall rules, to defend against that possibility.
You did not indicate whether you are trying to block users from accessing the GMAIL website, or whether you are trying to block incoming email from user@gmail.com.
I will assume, like SachinGuring, that you want to block access to the gmail website.
I think there is an easier solution than the one he gave you:
Web Protection... Application Control...Application Control Rules (tab)... New Rule
Action = Block, Control By = Applications, Application = gmail, For=<designated user, group, or network object>
However, gmail is probably one of the lower-risk webmail sites, because I trust their spam filtering more than most others. If you want to block gmail, you might want to consider blocking the entire webfilter category of "Personal email"
Gmail for Business allows connections from Outlook. You may need to block additional ports, using firewall rules, to defend against that possibility.
