You can set the default sender {KT_defaultsender} to show up as a name in the emails instead of an email address.
In your Interakt Control Panel configure the E-Mail settings as follows;
Default Sender: Friends of Interakt <myname@domain.tld>
Updating the configuration file by hand, find your tNG_config.inc.php file and search for:
$tNG_email_defaultFrom = "myname@domain.tld";
Change this to the following:
$tNG_email_defaultFrom = "Friends of InterAkt<myname@domain.tld>";