In the MUA forums, several moodle admins reported they had not got the security advisories for 4.3.4 and friends. (https://moodleassociation.org/mod/forum/discuss.php?d=1289#p4205).

This caused me to check, and the Open University also had not recieved it.

Therefore, Marina tried to send me them message again, and it never arrived.

Then, she sent me two simple test emails, one from her gmail account, which came thorugh. However, the mesage she tried to send from her moodle.com account to Tim.Hunt@open.ac.uk never arrived either.

Open Universtiy emails is Office 365 Outlook/Exchange cloud-hosted by Microsoft.

I guess that the way moodle.com email is configured is getting blocked by Microsoft, or something like that. Anyway, since the security emails are important, I thought I should report this, so it can be investigated. Thanks.

(I will also report this to the people who run our email here, since we really don't want these emails to be blocked.)