Quality of contact information

Contact data quality codes:

Code	Name
0	No errors
1	Temporarily cannot be delivered
2	DNS error
3	E-mail box is full
4	Message length exceeded
5	Timeout
6	Answering machine is on
30	No address listed
31	Format error
32	Address does not exist
33	Cannot be delivered
34	Delivery attempts are exhausted
35	MTA is banned
36	SPAM complaint
37	Blocked by recipient
38	Recipient does not accept attachments
39	Non-existent domain
50	Blacklisted contact