Mixmax, which is making e-mail interactive with apps that set-up calendar meetings and polls, raised $1.5 million from Harrison Metal, Floodgate’s Mike Maples and Ann Miura-Ko, Ram Shriram of Sherpalo Ventures and angels Eric Ries, Soundcloud CEO Alex Ljung, Nuzzel CEO Jonathan Abrams, Inkling CEO Matt MacInnis and Soundcloud’s Eric Wahlforss.