SOA
Start of Authority
Primary NS
Mailbox
hostmaster.optimalprograms.com
Serial
2026021802
Refresh
10800
Retry
3600
Expire
604800
Minimum TTL
3600
MX
Mail Exchangers
TXT
TXT Records
v=spf1 a mx ip4:52.71.223.129 include:relay.mailchannels.net include:yahoo.com ~all