How to format emails like debian-announce?

[Pétùr <peturvilj@gmail.com>]

I am wondering if the (nice) formating of Debian announce emails is
generated by a software or by hand.

If it is a software/configuration, I am interesting to know more. It
would be useful, for example, if there was a way to generate urls links
like this one[1] more or less automatically.

[1] http://www.example.com

or to quickly do header like this one:

------------------------------------------------------------------------
The Debian Project                               https://www.debian.org/
Debian 9 "Stretch" released                             press@debian.org
June 17th, 2017                https://www.debian.org/News/2017/20170617
------------------------------------------------------------------------

Of course, it depends of what editor do you use. I use Emacs when I use
mutt and thunderbird otherwise.