Email send by ODKCentral is missing domain in links

1. What is the issue? Please be detailed.

I have set up emailing using my own relay server. This is working well, only when changing the password the email send this link: https:///#/account/claim?token=[tokenredacted]
As you can see it doesn't have the domain in the link.

Do you know where I can setup the correct domain?

Mail Server configuration