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port 25 blocking is just the beginning. In most cases mail sent from a consumer facing ISP (Verizon, AT&T, RCN, etc) will not be accepted if the destination ser
by masukomi 11y ago
port 25 blocking is just the beginning. In most cases mail sent from a consumer facing ISP (Verizon, AT&T, RCN, etc) will not be accepted if the destination server is implementing SPF mail authorization, which most are these days.