I'd argue Apache license here. Making mailpile AGPL will limit your contributors, limit the distribution of your product, and limit the people willing to commit

I'd argue Apache license here. Making mailpile AGPL will limit your contributors, limit the distribution of your product, and limit the people willing to commit to it. Because of the restrictions the AGPL places on software, I wouldn't use it for personal projects, and definitely wouldn't use it for any commercial projects. Putting mailpile as AGPL would just make me look at other webmail clients like horde; the compliance costs are just too high for a webmail client.