What does the error message “550 5.0.0 No longer accepting from this IP range” mean?
This means that Grande has filtered a CIDR block of IPs (usually a full /16) for one or more of multiple factors, #1 always being true: • We received spam/abuse from this IP range • The owners of the IP range do not have valid contact addresses listed to report abuse to • The owners of the IP range do not respond to abuse complaints • The owners of the IP range do not act on abuse reports • The owners of the IP range actually collect email addresses of people sending abuse reports and spam them too! • The IP range owners use bogus contact information The geographic regions that are most prevalent for this type of filter (in order of frequency of listing) are Korea, China, Brazil and Spain (.kr, .cn, .br, .es are their TLDs.) At this time, Grande will not remove any listings unless the ISP does all of the following: Provides us with a list of all their IP ranges Configures inverse DNS for all IP ranges using a known and filterable format such as dyn.company.com.
This means that Grande has filtered a CIDR block of IPs (usually a full /16) for one or more of multiple factors, #1 always being true: • We received spam/abuse from this IP range • The owners of the IP range do not have valid contact addresses listed to report abuse to • The owners of the IP range do not respond to abuse complaints • The owners of the IP range do not act on abuse reports • The owners of the IP range actually collect email addresses of people sending abuse reports and spam them too!
