I have installed Matomo on Plesk server and have scheduled some reports using the default mail settings and have not changed anything. When I click send it says reports sent but we do not get it. Tried it on our office365 company email, private gmail and private outlook mail.
Thanks for the report. Can you please check: https://matomo.org/faq/troubleshooting/faq_34856/
and let us know what you find?