fixing log messages (#9341)

* fixing log messages

* update per review

* Update notification.go

* Update server.go

* Update notification.go

app/notification_email.go

@@ -89,7 +89,7 @@ func (a *App) sendNotificationEmail(post *model.Post, user *model.User, channel
 
 	a.Go(func() {
 		if err := a.SendMail(user.Email, html.UnescapeString(subjectText), bodyText); err != nil {
-			mlog.Error(fmt.Sprint("api.post.send_notifications_and_forget.send.error FIXME: NOT FOUND IN TRANSLATIONS FILE", user.Email, err))
+			mlog.Error(fmt.Sprint("Error to send the email", user.Email, err))
 		}
 	})