smtp.stf.com
DNS delegation of smtp.stf.com updated: Jun 20, 2013 3:06:47 AM
Delegation
step query auth servers
1 smtp.stf.com. . (m,h,f,e,k,c,i,d,l,a,j,b,g).root-servers.net. 2 smtp.stf.com. com. (c,l,a,d,g,b,k,f,m,e,j,h,i).gtld-servers.net. 3 smtp.stf.com. stf.com. (ns3169,ns1149,ns4153,ns2158).dns.dyn.com. 4 stf.com.s9a1.psmtp.com. com. (i,g,m,h,c,b,j,l,k,f,a,e,d).gtld-servers.net. 5 stf.com.s9a1.psmtp.com. psmtp.com. (ns3,ns1,ns4,ns2).google.com.
We pick m.root-servers.net , one of the 13 root servers (1), and ask it about smtp.stf.com and learn that com is delegated to 13 name servers (2), so we ask c.gtld-servers.net where we learn that stf.com is delegated to four name servers, including ns3169.dns.dyn.com (3), so we ask that one where we see a CNAME from smtp.stf.com to stf.com.s9a1.psmtp.com , so we have to start all over again. We already know that i.gtld-servers.net is authoritative for com (4) and ask it about stf.com.s9a1.psmtp.com and learn that psmtp.com is delegated to four name servers (5), so we ask ns3.google.com and get the following answer:
Authoritative answer
net. com. stf.com. dyn.com. psmtp.com. google.com. dns.dyn.com. smtp.stf.com. s9a1.psmtp.com. ns3.google.com. ns4.google.com. ns1.google.com. ns2.google.com. root-servers.net. gtld-servers.net. m.root-servers.net. a.root-servers.net. g.gtld-servers.net. ns3169.dns.dyn.com. e.gtld-servers.net. j.root-servers.net. i.gtld-servers.net. ns4153.dns.dyn.com. f.gtld-servers.net. m.gtld-servers.net. k.gtld-servers.net. h.root-servers.net. d.root-servers.net. d.gtld-servers.net. i.root-servers.net. h.gtld-servers.net. ns1149.dns.dyn.com. com.s9a1.psmtp.com. l.root-servers.net. k.root-servers.net. g.root-servers.net. b.gtld-servers.net. f.root-servers.net. c.gtld-servers.net. c.root-servers.net. ns2158.dns.dyn.com. a.gtld-servers.net. b.root-servers.net. l.gtld-servers.net. j.gtld-servers.net. e.root-servers.net. stf.com.s9a1.psmtp.com.
whois net whois com whois stf.com whois dyn.com whois psmtp.com whois google.com whois root-servers.net whois gtld-servers.net
whois stf.com , stf.com domain info api stf.com The mail server s9a1.psmtp.com There are more than two hundred domains that use the mail server s9a1.psmtp.com .
Half of those use the four mail servers s9a1 , s9a2 , s9b1 and s9b2.psmtp.com together, hereafter referred to as "mail server group 1 ", (example: polytainersinc.com , insparx.com and autofinauto.com ). Eleven percent of them use the two name servers dns1 and dns2.allegranet.com together, hereafter referred to as "name server group 1 ", (example: insty-printseller.com , amspeedy.net and allegraftl.com ). Eleven percent of them use the mail server s9a1.psmtp.com only (but neither s9a2 , s9b1 nor s9b2.psmtp.com ) (example: northtucson.insty-prints.com , insty-printstempe.com and allegranwa.com ). Eight percent of them use the three name servers dns3.easydns.ca , dns1.easydns.com and dns2.easydns.net together, hereafter referred to as "name server group 2 ", (example: dzlaw.com , pemi.com and tridel.com ). The four mail servers s9a1, s9a2, s9b1 and s9b2.psmtp.com together There are more than hundred domains that use mail server group 1 .
robtex on smtp.stf.com RBL listing of smtp.stf.com mnw
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