As you can guess from the title I wanted to know how to send more mail with a single mail Task (at different addresses, the same mail to more people)
Did you try to split by commas ',' check out the docs
Activiti User Guide
Hi Matteo Zanardo,
As Bassam Al-Sarori explained,
<activiti:field name="to" expression="${recipient}" />
you need to change the to field for multiple users and pass the values accordingly.
You can also send emails manually using script tasks by javascript apiexecute | Alfresco Documentation
There is one parameter
mail.parameters.to = "*****@****.com"; or mail.parameters.to_many = ['****@****.com','****@****.com'];
if you wants to send emails in multiple then pass the values in array
Thanks,
Vikash