I have had a few problem with exim4 and various phone mail clients (Windows Phone in particular) that seem to result from bad mail clients together with GnuTLS. I'd like to recompile exim4-daemon-heavy to use OpenSSL to see if that helps anything.Now, I've gotten used to debian's packaging system and am unsure on how to do this. I've downloaded the exim4 source using apt-get source exim4. I then edited the file Debian/rules to uncomment OpenSSL = 1.Then I tried make, but was told that I need to copy the template src/EDITME to Local/Makefile and edit it to my taste. My taste would be a drop-in replacement for the existing and running exim4-daemon-heavy, just using OpenSSL. And here I am stumped as there are quite a lot of options there and I don't like to break my email setup more than neccessary.So... what can I do to make this test?
How to recompile exim4-daemon-heavy?
debian;openssl;exim
Although the answer is in my comment/duplicate, lets do a summary of the commands you need for:Building exim4-daemon-heavy in Debian-like distrosmkdir exim4 && cd exim4apt-get source exim4     sudo apt-get build-dep exim4cd exim4-4.82  ### This could be different for you##Modify your option here in the `debian/rules` file~/src/exim4/exim4-4.82$ dpkg-buildpackage -rfakeroot -us -ucThis will give you the .deb files in the parent folder. The build-dep action to apt-get installs the BUILD DEPendencies for the given package.