Thread:Project:Support desk/Private Wiki with accessible Special:ConfirmEmail/reply

You might find help here: I think, the different links in the confirmation emails are caused by the different tokens (cf. Manual:$wgEmailAuthentication).
 * Manual:Preventing access (e.g. Depending on what extensions you have installed, you may want to whitelist more pages. [...] If the content language of your wiki is not English, you may have to use the translated name of the special pages in question.)
 * Manual:$wgEmailAuthentication
 * Manual:$wgEmailConfirmToEdit

Later you should customize MediaWiki:Prefs-help-email as well, because the standard message (Angabe einer E-Mail-Adresse ist optional) doesn't apply to your wiki.