Sending message to multiple vendors
From Protemos Wiki
The vendor messaging feature is implemented on the level of an individual job, invoice, and payment.
If you need to send a bulk messages to your vendors, as a workaround, you may export the list of the needed vendors to Excel using this page: https://cloud.protemos.com/vendor/index
Afterward, you can import their emails to an email marketing platform such as Mailchimp.
