This option came from Spree and we never used it. The config input field
is disabled in the admin interface and I checked our managed databases.
I don't think that we will want this feature in the future either.
Staging sends unmodified emails which is more realistic and we haven't
had a use case to intercept those emails. There's still the BCC option
if we need additional access.
It's an outdated Spree setting. We always enforce SSL in production and
staging while development and test environments are running without SSL.
This setting didn't have any effect.
We set this value to `true` unconditionally in an initializer, and then check the value in various places via Spree::Config. It's never false, and it's not configurable, so we can just drop it and remove the related conditionals. 🔥
Spree used to give you more options to configure ActionMailer but our
setup is much simpler. We can remove unused code.
The removed option was never used by OFN and defaulted to true. We don't
need a database migration because the value isn't set in the database.
