On 14/01/2020 15:28, Jutta Wrage via Exim-users wrote: > I cam trying to solve the following problem using exim4 and dovecot: > > Users having their own sites inside the domain (sitex.domain.de) should send > their outgoing mail in SSL sessions connecting to port 465. The password will > be verified by dovecot. > > Now I habe the problem that Exim is not accepting what the clients are > sending. They get disconnected already before the password is verified. > > The error in main.log is: > > SMTP protocol synchronization error (input sent without waiting for > greeting): rejected connection from H=[...] input="\200C\001\003\001" > > Is there any solution to this problem?
I think you've not told exim that for port 465 it should be doing TLS-on-connect, as a server. So it is expecting to speak first, sending an (inclear) SMTP banner - but the client is firing in a TLS Client Hello. You need the main-config option setting: tls_on_connect_ports = 465 See http://exim.org/exim-html-current/doc/html/spec_html/ch-starting_the_daemon_and_the_use_of_network_interfaces.html#SECTsupobssmt -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
