Hi, Thanks you very much. This did the trick!
> On 6. Apr 2018, at 15:56, Stephan Bosch <step...@rename-it.nl> wrote: > > > > Op 6-4-2018 om 13:52 schreef Paul Hecker: >> Hi, >> >> Dovecot 2.3.1 (8e2f634). Could not get Dovecot to forward the (plain) >> authentication to the SMTP server using submission. Reason why I need it is >> sender spoofing (do not want my employees to send messages in behalf of me). >> >> In exim I can disable sender spoofing with the authenticated user. When >> sending through dovecot, exim either does not accept the email (need auth) >> or relay every sender address (because relaying from localhost). >> >> Am I missing a setting or do I need any additional field in the (MySQL) >> user_query/password_query to forward the password? >> >> You can find my config here: >> >> https://gist.github.com/lluuaapp/7daddf761131da47237b0f45e6bab5a8 > > That would be possible using the following SMTP AUTH feature: > > https://tools.ietf.org/html/rfc4954#section-5 > > Which is apparently supported by Exim: > https://www.exim.org/exim-html-current/doc/html/spec_html/ch-smtp_authentication.html#SECTauthparamail > This requires explicit configuration, so it will not work out of the box. Here is what I did: I had to add the acl_smtp_mailauth to only allow this on a certain port. Then I had to duplicate my code for sender spoofing for authenticated users and change the $authenticated_id -> $authenticated_sender. Besides that, I must use TLS (in my case STARTTLS) so that Dovecot actually sends the MAIL AUTH parameter. > > The Dovecot Submission service should support this too. It sends an AUTH > parameter with the MAIL command (currently only then the username is a valid > SMTP address). However, I must say, I haven't tested this recently. I can confirm that it works (only with TLS with my current configuration, see above). > > I can try this in a few days. Feel free to experiment with this yourself. > > Regards, > > Stephan. Thanks again, Paul
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