He wrote in a personal email to my friend, M, after reading through comments on the school forum where we had to discuss about writing a paper for the subject.
I noticed that one of your group mates made a rather unflattering comment about your command of English grammar. I’ve had a look at several of your posts, and your grammar is really very good. So don’t take the criticism to heart!
Best, Mark F.
I’m really happy that my lecturer stood up for my friend :)