MSH Traffic Policy it's a milter which extends basic MTA functionality with powerful tools.
Add attachment to outgoing mails
Think about task when you need to add PDF file to each email message which is going to @gmail.com recipient. There is only one answer Recipient Condition with Add Attachment action.
|Message Recipient condition and Add Attachment action|
After defining rule with these condition and action, mail which are going to @gmail.com recipient will be send with an attachment.
If you need to:
- manipulate attachments and remove, strip and count them,
- manipulate sender and recipients, block messages, and filter using keywords
- add disclaimers
- and many more