As admin: Enable mailcatcher, mailhog, or have e-mail configured Disable "Mobile services": Site administration ► Mobile app ► Mobile settings Create a course, enrol two users as studnets (S1 and S2) and one user as teacher (T1) with valid email addresses for at least S1 and S2 if you are not using mailcatcher or mailhog Create a forum in the course with the "Subscription mode" force to all users In the forum settings the maxeditingtime to something really low (1 minute) Access to the site with U1 and post in the forum Wait for a minute an run the cron: php admin/tool/task/cli/schedule_task.php --execute="\mod_forum\task\cron_task" Open mailhog/mailcatcher/etc and find the e-mails Confirm that all the emails received from the site does not containg this text at the bottom of the email: "Reading this in your e-mail?....." Now, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Check that the " App download page " setting in Mobile app -> Mobile appearance is correctly set Access with S1 to the site using the app Post as teacher in the forum Wait for a minute an run the cron: php admin/tool/task/cli/schedule_task.php --execute="\mod_forum\task\cron_task" Open mailhog/mailcatcher/etc and find the e-mails and check that: In the email to S1 you don't see the "Reading this in your e-mail?....." text In the email to S2 you see the "Reading this in your e-mail?....." text