On 21.11.17 13:53, K F wrote:
I'm having a couple of problems.I have the certificate configured, but I can't
seem to be able to send to the server with STARTTLS
If I connect on port 25 with EHLO, it doesn't show that it can do starttls?
If I connect on port 587, it shows that it can do starttls, but the receipient
is rejected.
This will be a public SMTP server, so there is no authentication, but it should
allow STARTTLS to run anyways.
port 587 is designed for authenticated SMTP, so the default configuration
won't allow sending mail unless you have authenticated.
the default configuration also enables tls on 587, while it's not enabled by
default (25).
set smtpd_tls_security_level=may in main.cf and you'll be able to send mail
through port 25.
note that many mailservers don't require TLS and don't verify certificates.
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