IVM Blacklists: Email Blocklist Removal Guide
South African-origin DNSBL family covering IP (ivmsip), 24-hour recent spam (ivmsip24), and URI (ivmuri) zones. Primarily deployed in African and regional mail infrastructure.
network security
RFC 1939: Post Office Protocol Version 3 (POP3)
Defines the POP3 protocol for downloading email from a server to a local client.
