Even before you start you can make this error...
So, chatting with the business tutor... Says they got trouble with the email...
"Yes, before we get to that, can you see the problem with the email you sent me".
Reads email.
"No, the whole email."
"That is it." comes the reply.
"But below it, the advert."
"Yes I use that software." they reply.
"But what does it do? Why is your business advertising another companies product? What if it contains a virus (me knowing that this is malware at worse, snake oil at best). Do you want to give that kind of image to your clients".
"Quite frankly, with the kind of clients I have, I don't care."
Me knowing I'm one of their clients, do not give a reply...
Lesson learned. Be more tactful when dealing with professional clients in the future, as it's not easy to point out mistakes. No one wishes to hear of them.
I'll concentrate on offering a service of giving the customer what they ask for, what they want, and when their in real trouble what they need. All the while being polite and helpful, even if it means helping them trash their own pc. :P
Anon, for obvious reasons.