While that is unfortunate, I appreciate the quick reply!
(Reason for my question is that I want to use AcyMailing without the „fron controller“ and AJAX stuff. Therefore I am using my own forms and your API in PHP, so I need to make sure the links for confirmation etc. are also adapted to my needs. Except for this hostname (which I can of course work around) it works pretty well, I must say - thanks!)