How to send email attachments?

What is an email attachment?

An email attachment is a computer file sent along with an email message.
-- https://en.wikipedia.org/wiki/Email_attachment

Sending email attachments

• To send email attachments, please install and configure the SMTP Authentication Support module or the Mail System and SwiftMailer module
• Make sure to check 'Include files as attachments' in your email handlers
• Then add 'File upload' or 'Attachment' elements to your webform

Sending file uploads as email attachments

• Setup private files directory (PSA-2016-003) 
• Add 'File upload' to your webform
• Check 'Include files as attachments' in email handlers

Sending custom email attachments

• Install the Webform Attachment sub-module
• Use 'Attachment token' or 'Attachment Twig' to generate an attachment
• Use 'Attachment URL' to send URL or path as an attachment
• 'Attachment' elements support custom file names, link text, and forced downloads
• 'Attachment' elements act like 'File upload' element
• Check 'Include files as attachments' in email handlers

Using the 'Attachment URL' element

• URLs and file paths must be publically accessible
• URLs and file paths are never shared with end-users