Feature: Add Custom Headers for SMTP Integrations / Postmark for Broadcasts

[joshvickerson]

I would like to use Postmark for both broadcast and transactional sends. This is available in Postmark, but requires a custom header when authenticating via SMTP:

Header: X-PM-Message-Stream: broadcast

Right now, Notifuse uses the Postmark transactional stream, even when authenticating with Postmark's broadcast SMTP server: smtp-broadcasts.postmarkapp.com

I would like the ability to add custom headers to the SMTP integration so I can specify which stream in Postmark to use.

Alternatively, if the Postmark integration could be used for both and use the correct stream that would solve my need as well.

[pierre-b]

Hi @joshvickerson , maybe adding a new toggle "transactional/marketing" in the postmark integration form that would conditionally configure the proper stream and header?

[pierre-b]

The stream setting has been added to the Postmark integration in https://github.com/Notifuse/notifuse/releases/tag/v28.2!