Unwanted sentence in email message sent manually from a project

Hello,
When sending a message from a project, just under the written message, there is a group of unwanted expressions (surrounded by the redline in the picture below), these expressions are not present when sending a message from a milestone or an activity.
:

I don't know where the message content is defined and how I could remove these expressions.
Thank you for your help.
Best regards
Thierry