Originally Posted by peterspoon
"e.g. webmaster.domain.tld" which is probably a mistake. Doesn't accept firstname.lastname@example.org
In the "Wizard mode" it does accept!
Thats no mistake. The correct format for domain records in DNS servers like bind or mydns is admin.domain.com. (with the dot at the end). The dns whizard ahs a converter to make it easier to add records, thats why it converts email addresses with @ inside.