Hi Nick,

Port 587 is the proper MUA submission port, not 465.

https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

https://tools.ietf.org/html/rfc6409

http://blog.mailgun.com/25-465-587-what-port-should-i-use/


Port 465 is not RFC compliant.

Perhaps Apple Mail expects the RFC port 587 to be operative?


Cheers,
-- 
Craig Skinner | http://linkd.in/yGqkv7

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