E-Mail Notification with https link to new item

Hi all,

we have a vibe 3.4 system and want to use the e-mail notification features so all in our team will get those status messages.
Generally this feature works and we get mail. The problem is that the links in the mail to the new item starts with http://... not https:/xxx.

How can this be configured so the links use secure https to the items??

kind regards,
Martin