What is your goal?I’m looking to use a Mailersend module following a Webhook response module which builds a PDF web output but can find no way to then attach the generated output to the email message I wish to send.
What is the problem & what have you tried?Webhook response works fine but unable to find any setting in Mailersend module which would enable attachment
Hey David 
You’re not missing some secret MailerSend setting here. The problem is more about how the PDF is being created and passed through the scenario, not a checkbox inside the MailerSend module.
To really see what’s going wrong and suggest an exact fix, could you share a screenshot of your current scenario showing the modules in order, especially around the Webhook response and the MailerSend step?
-John
Your best bet is to split the work: generate the PDF first then store it, then send it. Use your dedicated PDF generation service or an HTTP module that will return a file URL or binary data, and store that output, then pass it into the Mailersend attachment field. This will allow the Webhook Response to still fire separately to handle your web output.
If you’re generating the PDF via a URL that renders it, you can fetch that URL as binary using an HTTP module and map it directly into the attachment field. What PDF tool are you using to build it?