LOG: H=[V4NET.0.0.0] F=<> temporarily rejected RCPT <a1@b>: unknown lookup type "<"
>>> using ACL "a2"
>>> processing "deny"
>>> check hosts = 1.2.3/24
>>> host in "1.2.3/24"? no (malformed IPv4 address or address mask)
LOG: H=[V4NET.0.0.0] F=<> temporarily rejected RCPT <a1@b>: unknown lookup type "<"
>>> using ACL "a2"
>>> processing "deny"
>>> check hosts = 1.2.3/24
>>> host in "1.2.3/24"? no (malformed IPv4 address or address mask)