I encountered following problem:
I send three kinds of emails:
first that has in TO: only my employee email address: *@mycompany.com
second that has in TO: my employee and my client address: *@mycompany.com and email@example.com
third that has in TO: only my client email address: firstname.lastname@example.org
I want to build a filter which will assign a label to all emails which were sent to my clients or to my client and my employee but I want to avoid those that were sent only to my employee.
In other words I want to label all emails, but not those which were sent only between me and my employees.
How can I achieve this?