Maintain a DNS Zone + Configure an IMAP and IMAPS service
Among the Domains and Competencies for the exam, there are
"Maintain a DNS Zone"
"Configure an IMAP and IMAPS service"
Can someone please be a tad more specific on what do they mean and the kind of skills required, since these topics are not covered by LFS201?
Of course I have made some research, but I can't find resources using that kind of phrasing as a title and the contents I come across vary widely. Since I lack a good knowledge of these topics even on a theoretical level I'm not sure I'm looking at the correct stuff.