I never want to use either Acrobat Pro XI or Acrobat Reader XI to send an email, because I use multiple e-mail accounts. It's easy to disable this feature completely. Simply rename the plugin files from "sendmail.api" to something else, such as "sendmail.oldapi". It's important to change the filename extension to something Adobe cannot recognize. These files are located in C:\Program Files\Adobe\ subdirectories on a 32-bit machine and are located in C:\Program Files (x86)\Adobe subdirectories on a 64-bit machine. This prevents either Adobe product from hanging on startup when they try to load all the plugins and disables e-mail sending from within the Adobe products completely. Now you have to sve your files and attach them manually to e-mails using your e-mail client, but that's just prudent practice anyway—you do want to verify that you are sending the correct attachment befor you click on "Send", don't you?
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