Where have email account details to be entered?

[GeoHub01]

it probably uses the default php sendmail, you can configure it from php using ini files, and specify the user in gsconfig.php

Dear shawn_a,

thank you very much for your kind answer. I need PHPmailer for testing purposes so I try to switch to the plugin called "Contact Form", which is already also putting obstacles in my way leading to a hopefully working and customizable contact form.
Believe or not, I tried GetSimple CMS for I wanted a quicker way to get to a working webpage than by using Drupal 7, but in certain use cases GetSimple CMS is as cryptic to me as is Drupal 7. The difference is that with Drupal you find lots of hints on the web. With GetSimple CMS I can only hope that experienced users or even developers offer some advice. So now I head over to the "Contact Form" forum and seek there help and advice.

Best regards and thank you gain for your answer.