I've receive an email from trendmicro regarding Hosted Email Security (HES) Notification, asking to:
«Configure your firewall to accept emails from the following IP address range of our mail server so that Trend Micro Hosted Email Security service can deliver email to your business.
You may already have these configured:
You must add these:
More information is also available http://esupport.trendmicro.com/Pages/How-to-accept-emails-coming-from-Hosted-Email-Security-servers-only.aspx
My question is what is this?
I have a relay configured to my isp provider that is Vodafone.
What it's necessary configure on ISA server, which is my firewall?