For some weeks now, I have not been receiving e-mails from mailing lists to which I am signed up or legitimate websites that usually e-mail me regularly. Other e-mails do arrive safely, so fixing the issue is not essential, but it would be useful.
Possibilities I have ruled out:
- E-mails going to the spam folder (the first place I looked).
- Blocked senders or domains (my blocklist is empty, and I have marked some of the senders of the affected e-mails as safe).
- E-mails not being sent (I am signed up to one of the mailing lists with two addresses - long story - and the other one has not been affected).
- Antivirus or network control issues (the problem persists on mobile and on 4G).
My working hypothesis is that an overzealous server-side spam filter has been deleting these e-mails rather than sending them to the spam folder, mistaking legitimate daily updates for nuisance e-mails. (My new Outlook account is certainly sending too many patently genuine messages to the spam folder, but at least I can recover those. Unlike the ones that go missing in the process of auto-forwarding everything from BT to Outlook, which I set up in the hope of intercepting the lost e-mails before they went astray. It did not work.) Is that likely to be the case, and if it is, can I do anything about it, other than switching everything to Outlook (which is possible but not ideal)?
