Vacation use different SMTP server

[KOCIK Fabien (Acoss)]

Hi,

I had the same problem and solved it at architectural design level.

Instead of forcing Sieve to use a different SMTP server, I declared some transports in the sending SMTP server to force it to route internal domains directly to receiving SMTP server without going to the Internet.
So, internal mails remains on internal network and there is only one SMTP server for all mail traffic.

Sorry, I know that I don't answer directly to the original question. But in the context, may be an idea ?

Regards.
Fabien

-----Message d'origine-----
De : dovecot <dovecot-bounces at dovecot.org> De la part de azurit at pobox.sk
Envoyé : vendredi 24 janvier 2020 12:39
À : Dovecot Mailing List <dovecot at dovecot.org>
Objet : Vacation use different SMTP server

Hi,

in our setup, we have two SMTP servers:
  - one for receiving messages (this one is using Dovecot's LMTP for delivery)
  - one for sending messages (this one is used by our users as outgoing SMTP server)

Only the first one has list of local domains, local e-mail accoutns etc. so the second one will ALWAYS use MX records for delivery - with this setup, we can allow to our users to add any domain to their accounts (for example, if someone will add gmail.com and create e-mail accounts on it, it's complete safe because we will never deliver mail for gmail.com locally). The only problem seems to be vacation messages (maybe other messages send by sieve), as Dovecot is using the first SMTP server for sending.

My questions: Can i set different SMTP server for sieve messages? How exactly is Dovecot/Sieve choosing which SMTP server will be used?

Thanks.

azur