Email continuity / ActionMailbox with Postal server

Is your enhancement request related to a problem? Please describe. Per GDPR requirements, I prefer when possible not involve other data processors (like Sendgrid, Mailgun, etc.) and thus I have deployed my own mailserver using Postal.

Describe the solution you'd like It will be great if conversation continuity could work with a postal server but for now, despite my numerous trials, I could not succeed to get it to work with Postal.

I have tried with different endpoints (postmark, relay, etc.) without luck (with and without password).

I also put you in the Additional context section a link to a blog article that seems promising and screenshots of Postal web-ui.

Additional context

• Postal, the open source mail server (official website)

• Postal, the open source mail server (Github repository)

• [HowTo] Rails ActionMailbox with Postal (blog article)

Postal HTTP Endpoint configuration

Postal incomming Routing configuration

Postal route detail