Ze,


On Sat, 2 Nov 2024, Zé Loff wrote:

There are no advanced settings on the iphone....there is no place to enable or
disable pipelining or anything of that sort.

Should I conclude that it is impossible to send email from an apple iphone to an
opensmtpd server ?


In my experience, this kind of error is TLS related.  Double check if
the port and protocol settings -- namely STARTTLS vs. SSL/TLS and port
25 vs. port 465/587 -- on the iPhone match those on the server.



My opensmtpd server does not use TLS nor does it have certs - it does NOT have any lines like these examples:


# PKI for TLS
pki example.com cert "/etc/ssl/example.com.crt"
pki example.com key "/etc/ssl/private/example.com.key"


.. and I did not create any cart/key for this server.


On my iphone I did NOT select "Use SSL" and my auth is simple "password".

Again, these are very normal and simple config settings that I would expect to see with any mail client ... which is why I am surprised it is not working.

Perhaps nobody uses a plaintext port 25 mailserver so it doesn't get the QA and testing that it should by Apple ?

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