Hello,
We use an activity for outbound Email (CRM 7.01). A default signature (Signature for HTML) is maintained (Menu -> Signature). You can add a picture to this signature (e.g. company logo) and save this signature. When a new outbound email is selected (format HTML) this default signature is inserted without the logo. Manual add the company logo into the email is possible, but when a picture is maintained in the signature it's being removed.
Regards,
Kim