exim4-daemon-light - 4.92-8+deb10u6 main

Exim (v4) is a mail transport agent. This package contains the exim4
daemon with only basic features enabled. It works well with the
standard setups that are provided by Debian and includes support for
TLS encryption and the dlopen patch to allow dynamic loading of a
local_scan function.
.
The Debian exim4 packages have their own web page,
http://wiki.debian.org/PkgExim4. There is also a Debian-specific
FAQ list. Information about the way the Debian packages are
configured can be found in
/usr/share/doc/exim4-base/README.Debian.gz, which additionally contains
information about the way the Debian binary packages are built. The
very extensive upstream documentation is shipped in
/usr/share/doc/exim4-base/spec.txt.gz. To repeat the debconf-driven
configuration process in a standard setup, invoke dpkg-reconfigure
exim4-config. There is a Debian-centered mailing list,
pkg-exim4-users@lists.alioth.debian.org. Please ask Debian-specific
questions there, and only write to the upstream exim-users mailing
list if you are sure that your question is not Debian-specific. You
can find the subscription web page on
http://lists.alioth.debian.org/mailman/listinfo/pkg-exim4-users