Yes, this is possible. To start, navigate to Menu > Contacts > Contacts and click All filters (center of the screen, above the contact table) to filter for Import is any of [your import]. After doing so, you can select all contacts by clicking the top left checkbox.
Yes, this is possible. To start, navigate to Menu > Contacts > Contacts and click All filters (center of the screen, above the contact table) to filter for Import is any of [your import]. After doing so, you can select all contacts by clicking the top left checkbox.