Can I send a different attachment to each recipient in my Mail Merge?
At this time, you cannot upload a different file for each recipient sent via Mail Merge. Uploading an attachment to your Mail Merge draft will send that copy of that attachment to all included recipients.
You can, however, host your attachments and add the URL to a Free Form column in your Pipeline. Then, you can use the Mail Merge Templates to insert each recipient's individual URL into the body of the email. This will send each recipient a unique link to their copy of the attachment within the body of the email.