$TTL	60000
@		IN	SOA	resdns.sillymail.com. root.resdns.sillymail.com.	(
			1 ; serial
			28 ; refresh
			14 ; retry
			3600000 ; expire
			60000 ; negative cache ttl
			)
@		IN	NS	resdns.sillymail.com.
@		IN	MX 5	smtp.sillymail.com.

resdns		IN	A	20.30.40.50
smtp		IN	A	20.30.40.60
imap		IN	A	20.30.40.60