Q1: Basically, yes. You should note though that there are different kinds of network addresses such as IP addresses, subnet addresses/prefixes, or MAC addresses. The exact meaning of each term depends on context. Q2: If the IP address/mask is 184.19.39.34/16 then 184.19.0.0/16 is the subnet address. 39.34 is the host part of the IP address … Read more
IronPort utilizes 4 Host Access groups which decide what policy will be applied to a sender based on their reputation on SBRS. WHITELIST: $TRUSTED (My trusted senders have no anti-spam scanning or rate limiting) BLACKLIST: sbrs[-10.0:-3.0] $BLOCKED (Spammers are rejected) SUSPECTLIST: sbrs[-3.0:-1.0] $THROTTLED (Suspicious senders are throttled) UNKNOWNLIST: sbrs[-1.0:10.0] sbrs[none] $ACCEPTED (Reviewed but undecided, continue … Read more