authentication to outbound smtp server

[alanbbr]

Does Stalward support authenticating to an upstream/outbound/submission SMTP server? I can get inbound port 25, but outbound is blocked. I can use port 587 to send via my ISP, but that requires a user/password, as notified in the 250 AUTH reply to EHLO. I don't see anything in the documentation about how to store an outbound user name and password, like postfix does with smtp_sasl_password_maps = .... in main.cf.

[mdecimus]

Yes, you need to set it up as a relay host.

[alanbbr]

That describes setting up an unauthenticated relay host. I need to set up an authenticated relay, or I have to use postfix or some other tool in addition to Stalwart.

[mdecimus]

https://stalw.art/docs/smtp/outbound/routing/#authentication