With IPv4 prefix matching, an IP address or subnet is specified, optionally followed by a slash and the number of bits from the prefix that are significant when comparing for a match. For example, the following matches anything in the 123.45.67.0 subnet:
$(123.45.67.0/24)
With IPv4 ignore bits matching, an IP address or subnet is specified, optionally followed by a slash and the number of bits to ignore when checking for a match. For example, the following matches anything in the 123.45.67.0 subnet:
$<123.45.67.0/8>
The following example matches anything in the range 123.45.67.4 through 123.45.67.7:
$<123.45.67.4/2>
IPv6 matching matches an IPv6 address or subnet. Note that IPv6 connection handling is not currently supported in Messaging Server.