You can automate that, just not with Toad. You will need to parse your email text somehow and extract the data of interest. There are many hits on Google for writing VBA scripts and what not to get to email text from Outlook. You will need to get the data out of your email through a script or software of your own writing. Once you have that I'd take Toad out of the loop and just construct your SQL, save it to a temp file, and pass the file to SQL*Plus for execution.
Toad's Automation Designer can automate many things, but it cannot monitor your email system for you and extract what you'd like from emails.
Michael