I couldn’t find a way how to change the sender of the automated messages. By automated messages I mean - the “Account temporarily blocked” message, “Congratulations on your trust level promotion!” message, “Thanks for spending time with us and others” message, and others. Would appreciate any help, thanks in advance!
You should be able to change pretty much all site texts, including these, from your /admin/customize/site_texts page. If you search for a key snippet of the thing you want to change it should bring it up and you can edit it from there: