I had this problem, my domain was deactivated last week. Due to some billing conflict, but it's now back to full operational. However, my boss asked me if I could make a back up plan for the domain.
So my question is, will a dual domain pointing to the same DNS server is ok? Like domain1.com and domain2.com pointing to one dns server. And how will it affect my email system?
Hope to hear from you guys soon.
Thanks in advance.