Mailpress compatible?

Hello, we are an editorial online and use Mailpress since years bue as it seems to de dead, are trying to use your “looks very well” plugin.
but… is it compatible to export and import the data from Mailpress, we have almost 50.000 suscribers in ours newspaper and is completely imposible to do one by one.
I mean, it is possible to import the suscriber with the maillist they have?
thanks very much in advanced, your plugin looks very professional and likes the idea to proof for free but pay if you are a professional, well done????
Asís