Hey Craig,

Solved by additionally specifying port, TLS/SSL and password auth (check my 
previous mail).

Worked on port 465 as well.

Sent from my iPhone

> On 10 Apr 2018, at 5:43 PM, Craig Skinner <skin...@britvault.co.uk> wrote:
> 
> 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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