Outlook email messages may not contain signatures when used with MAPI. Try disabling the Outlook signatures as a first step to fixing any MAPI error messages. Click here for details.
Error messages may be displayed if the email client you are using is not MAPI compatible or if the default email client has not been defined. To set the default email client, access the Defaults Programs item in the Windows control panel. pdfFactory determines the default email using these registry keys:
The pdfFactory Send button will not work with web-based email programs such as Gmail, Hotmail or Yahoo Mail. Yahoo Toolbar and other add-in will allow MAPI connectivity. Please contact the appropriate site for details.
Outlook 2013 and 2016 have an encryption option which can impact the Send button in pdfFactory. Click here for instructions on how to disable encryption in Outlook.