Sending emails from external mailboxes
From Planfix
Planfix can send email notifications from external email addresses. You can configure these emails at the user level (from an employee's external email address) or at the account level (from a company's external email address).
This feature is most commonly used to create the scenario where your clients, partners, and/or contractors get emails from company or personal email addresses, as they're used to, and you do all of your work in Planfix.
Configuring external email addresses
Configuration can be done in Account Management / Email / Outgoing messages. Detailed instructions on configuring emails for employees and companies can be found here: