In BulkMail you may want to export your list of contacts you have created. To do this, go to contacts > Lists.
On the lists screen, hover over the list you want to export and click the orange action button.
On the dropdown click export contacts. If the list is small then it will give you the option to download the list immediately. If you have a large list then it will send you a download link via email. This is for security reasons.