Kevin, Regarding the configuration error, your missing a package: zlib1g-dev
As far as the deprecation warning, it's a bit more complicated. The source of Dovecot needs to be patched to check for the OpenSSL version and depending on the version use a different DH_generate_numbers function. Regards, Peter -- Peter van der Does Facebook : https://www.facebook.com/petervanderdoes Twitter : https://twitter.com/petervanderdoes GitHub : https://github.com/petervanderdoes About Me : https://about.me/petervanderdoes