Delete the Email task from your BPMN web Design (process graphic)
Delete the Email from Work Item Handlers
go to Settings/Service Tasks and Install Email (if it is installed, unistall it and click on install)
fill the form with required parameters: host : smtp server host name port : smtp server port number username : account to be used when login to SMTP server (the email address) password : account's password to be used when login to SMTP server
if you provide all this informations, the Work Item Handler will be generated automatically ( you can check it in Settings/Deployments/ work Item Handlers), DON'T EDIT IT !
Go back to your Process, and insert again the email task as in the following screen shot
Select your Email task, go to the Diagram properties (on the right), and click on Assignments.
You can now assign global variables or constants to each attribute (Body,From,Subject,To) From : valid email address To : valid email address of the recipients (to specify multiple addresses separate them with semicolon ';') Subject : email subject Body : email body (can include html)