According to forum post : there are a solution for 3.X version.
https://forums.limesurvey.org/forum/french-forum/156014-mot-de-passe-lien-d-urls-pour-les-gestionnaires-ko-avec-plusieurs-serveurs

Then : issue , not feature request.

My opinion : maybe add an optional settings adminurl for sending email for admin ?

Did you try to set homeurl

1. admin page must use homeurl
2. token page must use publicurl

Yes using the homeulr variable, it works well with my VMs.
I'm going to contact my colleagues because there must be work on the mail servers, and with the proxy, I have no control.
But the idea of ​​an adminurl wouldn't be bad

@tibor.pacalat I can take thçs one.

Need to udate PHPMailer for a option about url to be used + option here : https://github.com/LimeSurvey/LimeSurvey/blob/5bc06f5284736da00bddb44b8d98b406e6ea2fdb/application/core/LSYii_Controller.php#L166 to allow public OR admin url

PS : we do not need an adminurl … if you ask password on http://192.168.56.113/admin : you need a http://192.168.56.113/admin url.

Just activate or deactivate usage of public url

adminurl can be interesting for Basic and Detailed Admin Notifications Email only.
But default on Basic and Detailed Admin Notifications Email must be current server too.

publicurl must be used only for token email: invitation, reminder and confirmation

https://github.com/LimeSurvey/LimeSurvey/pull/3910

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=36451

Tested and merged.

Fixed in Release 6.5.17+240715