Imail Autoresponder: changing the max length

[ADAM Web Design]

Hi there,

I need to create a very long autoresponder (about 14,000 characters) and I can't figure out how to change the max length in IMail 8.1. I've got admin access to it so I should be able to adjust it from there but I can't find the setting.

Also, is it possible to create an HTML-based autoresponder?

Thanks.