id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
37161	Implement a system check for deprecated mail settings	Jacob Walls		"Because the deprecated mail settings will stop working in Django 7.0, this could lead to data loss if someone misses the deprecation warnings and fails to migrate to `MAILERS`.

For a similar scenario with `STORAGES`, on the forum we [https://forum.djangoproject.com/t/deprecation-of-default-file-storage-can-we-easen-the-migration/34284/20 appeared to agree] that in retrospect, we should have implemented a temporary system check in `core.checks.compatibility` despite some disagreement about what a more robust, permanent solution might look like for retiring settings.

An example where this was implemented before is in 354acd04af524ad82002b903df1189581c51cabe, although it's not a perfect analogue because that check only checked for ''conflicts'' between old & new settings--which we do have right now in 6.1, raising a runtime `ImproperlyConfigured`--not the presence of the old settings at all.

(Interestingly, the `ImproperlyConfigured` is swallowed by `manage.py shell`...)

Anyway, I think we should consider adding a system check during the deprecation period."	New feature	new	Core (Mail)	dev	Normal			Mike Edmunds	Unreviewed	0	0	0	0	0	0