I have been enjoying our email exchanges, and will continue to do so as needed. However, I thought I needed to make some comments here in the forum.
I see little utility to Mail Iconizer and will explain below, and I continue to believe the first practice is to simply send in Plain Text and to place all attachments last in the message.
Mail Iconizer has no impact on what Mail will display in the received message -- I have tested messages sent from those using it before. Interestingly, it has little to no impact to what will display with Thunderbird on my PC with Vista -- the images would continue to Inline View.
In email jargon, the most common nomenclature for an image viewing in the body of the message is "Inline View" -- in Thunderbird for one example, there is a setting to have Inline View on or off. Otherwise image files will display open in the message. This was the same for those sent with and without Mail Iconizer.
Apple uses the nomenclature of View in Place and View as Icon -- doesn't change what is sent to others.
The files sent when using Mail Iconizer will have a different header, which instead of having Content-Disposition: Inline will have Content-Disposition: Attachment. In my examinations, this might help with a recipient using Lotus Notes, and maybe AOL. But with any modern email client, should not matter. It is an open question what versions of Outlook and Outlook Express could be considered "modern".
View as Icon has no impact on what you send, but only what you see on your Mac. No impact on the recipient.
Ernie