Files in this directory are historical. They may have worked once but the project has no assurance that they still do. If you need to use one for a build for your platform, copy it up one directory level first. We'll reinstate it given a current version and evidence of testing. For the latter please look into the project regression testsuite, and please consider operating a buildfarm animal in the long term (it runs the testsuite). The buildfarm status page is: https://buildfarm.exim.org/cgi-bin/show_status.pl There's a "register" link there with a link to how-to instructions. Please do monitor the status of your animal on an ongoing basis. The exim-users or exim-dev mailinglist are good places to ask for help and to discuss any regressions seen in test runs. There is also the #exim IRC channel on Freenode.