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AKAIK it is still possible with most popular email servers to send and recive using only IP addresses (e.g. by placing the address in brackets). DNS is really
by unixnoob 14y ago
AKAIK it is still possible with most popular email servers to send and recive using only IP addresses (e.g. by placing the address in brackets).
DNS is really only optional for email, at least functionally. But I think a lot of people assume there can be no email without domain names.