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Other ISPs don’t block outbound use of port 25, why does Cox?

April 26, 2017block Cox don’t ISPs outbound port

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Other ISPs don’t block outbound use of port 25, why does Cox?

1 Answer

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10 Posted

Although some ISPs may currently allow the use of third party outgoing mail servers, other providers such as MSN, Earthlink, Mindspring, Verizon, and Mediaone do block outbound use of port 25. We adopt this industry standard among ISPs to help control the volume of outgoing spam and the dissemination of viruses. As the problem of spam continues to proliferate, we believe that other ISPs will implement this and similar blocks.