My email is not functional because the problem below:
''The issue takes place because your domain name is not configured to work with Open-Xchange at the moment.
This domain name is pointed to nameservers of Bravehost and uses the following MX records:
If you would like to use it with Open-Xchange then you need to add DNS records provided in this article: https://www.namecheap.com/support/knowledgebase/article.aspx/1340/93/openxchange-records-for-domains-with-third-party-dns
These records are to be added on the side of Bravehost''
Therefore,Where do I put the DNS records at Bravenet?