I don't receive any messages via e-mail for notifications

As an example, I’ve still not received an e-mail for Unable to log in to `community.gaijin.com` - #2 by Stona_WT or Community Bug Reporting System, despite those notifications occurring many months ago. I know that I should have received an e-mail for at least the first URI, because https://forum.warthunder.com/u/RokeJulianLockha/preferences/emails is configured to “Always” send me notifications via e-mail, and the preference operates on every alternative Discourse server I’ve utilized.

  1. Has anyone else experienced this?
  2. If so, have you been able to remediate it?
  3. If so, how?

Reported to https://support.gaijin.net/hc/en-us/requests/2602080.