e-newsletter: is it possible to export email addresses in csv format

Hello,

Is it possible to export email addresses in e-newsletter members to a csv file so that we could use this in other system to send emails such as Mailchimp?

I'm using Mailchimp plugin on my Wordpress multisite. However, it cannot be used in each sub site. So it'd be really useful for my users to be able to export their email lists from e-newsletter to send out emails to their subscribers using Mailchimp.

Thank you,
Sawitri