There are some questions in the support forum about how to change the greeting email. The answer: not, or with a purchased app.
I have a suggestion as to how to change this without changing a file in the installation that would be overwritten with the next update.
There is one item that I can change: the skeleton, the folders, files and messages that are written to the area of newly created users. For this there is the variable ‘skeltondirectory’ in the config.php, which points to a folder outside the installation. Ideally into the administrator’s folder, so that he can edit this folder directly.
Why not introduce a variable called ‘greetingmaildirectory’ that does the same for the greeting email. The folder could contain an “html” file with
<html>
<p>
Example text
</p>
</html>
This page could be edited as desired and is then used as the body for the greeting email.
Spielmops