I have successfully upgraded from Moodle 3.5 (PHP 7.0, MYSQL 8.0) to Moodle 3.6 (PHP7.3, MYSQL 8.0) to Moodle 4.0 (PHP 8.0, MYSQL 8.0) on Ubuntu 22.
Currently the Outgoing mail settings in the Moodle is not set, yet the users are still receiving email alerts.
How is this possible?
How do I check or disable this?sendmail doesn't have to be a running process to be called by php.
php -i |grep sendmail
sendmail is actually 'split' ... one for localhost (submit) and one for sending/receiving (true sendmail) to other systems. Is your root user getting any system emails/notifications? That would be useful me thinks! Might install alpine to see.
Depending upon how hosted, it is possible for an internal network to have an internal mail server for all port 25 traffic - no smtp setup required.
Look at the full header of the message you did get, reading from subject line upwards to the top of the header. Think you will see phpmailer which is built into moodle.
However, can turn off any email using a line in config.php file.
$CFG->noemailever = true;
'SoS', Ken
I really need to disable this now as it is a test machine and it is spamming the real students.
$ telnet localhost 25 Trying ::1... Connected to localhost. Escape character is '^]'. 220 foobar.example.com ESMTP Postfix (Ubuntu)In the above example it is Postfix. Since you are on Ubuntu you can do something similar to:
quit
Connection closed by foreign host.
$ sudo apt-get remove postfixMay be you want to stop this test Moodle sending mail at all. There is a parameter for config.php. Check config-dist.php.
$CFG->nomailever = true;
