Hmmm, how about Mailtrain [0], which is free and open-source? I like Sendy [1], but it's per-domain licensing policy does not work for me - I manage a bunch of

Hmmm, how about Mailtrain [0], which is free and open-source? I like Sendy [1], but it's per-domain licensing policy does not work for me - I manage a bunch of nonprofits on a single droplet and do not have any desired to license all of them. [0]: http://mailtrain.org/ http://mailtrain.org/ [1]: http://sendy.co/ http://sendy.co/