Legend in the body of e-mails

I need to know how to avoid Avast including the legend that it’s a safe mail because it’s revised by Avast in the end of the body of my e-mails.
Please can anybody help? Thanks. I enclose the legend Avast includes in my mails in a screen capture. Thanks again.

Remove the ticks on the last screen

Only the last one was checked, I unchecked it and I’ll see. Thanks for you quick answer!
I supposse I should restart the computer for the change to happen.