[Mailman-Developers] Can i use the Bouncer API a Programm wich is not GPL?

We are building a newsletter application for the django framework. For bounce detection we want to use the Mailman bouncerAPI because reimplementing would be a bad idea. Now my question is: can i release my application under a less restrictive license like the bsd license? I don't distribute Mailman i only list it as a requirement in setup.py

According to the gpl-faq this is a borderline case because i only invoke a function and wait for the response. http://www.gnu.org/licenses/gpl-faq.html#NFUseGPLPlugins

Is it possible to use Mailman like this? Is this the intended use of the BouncerAPI?

Marc