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DNS-problem - authoritative Nameserver refused, not defined or timeout

Checked:
08.07.2026 01:03:17

Older results

No older results found

1. IP-Addresses

Host	Type	IP-Address	is auth.	∑ Queries	∑ Timeout
spf.smtp2go.com	A		yes	1	0
	AAAA		yes
www.spf.smtp2go.com		Name Error	yes	1	0
*.smtp2go.com	A		yes
	AAAA		yes
	CNAME	www.smtp2go.com	yes
*.spf.smtp2go.com	A	Name Error	yes
	AAAA	Name Error	yes
	CNAME	Name Error	yes

2. DNSSEC

Zone (*)	DNSSEC - Informations

Zone: (root)
(root)	1 DS RR published


	DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=


	• Status: Valid because published


	4 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 38696, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 54393, Flags 256


	Public Key with Algorithm 8, KeyTag 57780, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 22.07.2026, 00:00:00 +, Signature-Inception: 01.07.2026, 00:00:00 +, KeyTag 20326, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: com
com	1 DS RR in the parent zone found


	DS with Algorithm 13, KeyTag 19718, DigestType 2 and Digest isuwzSj0ElCoCkkTiUJNNBUi2Uaw2gwCkfLT13HXgFo=


	1 RRSIG RR to validate DS RR found


	RRSIG-Owner com., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 20.07.2026, 20:00:00 +, Signature-Inception: 07.07.2026, 19:00:00 +, KeyTag 57780, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 57780 used to validate the DS RRSet in the parent zone


	2 DNSKEY RR found


	Public Key with Algorithm 13, KeyTag 19718, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 13, KeyTag 27677, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner com., Algorithm: 13, 1 Labels, original TTL: 86400 sec, Signature-expiration: 21.07.2026, 14:02:35 +, Signature-Inception: 06.07.2026, 13:57:35 +, KeyTag 19718, Signer-Name: com


	• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 19718 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 13, KeyTag 19718, DigestType 2 and Digest "isuwzSj0ElCoCkkTiUJNNBUi2Uaw2gwCkfLT13HXgFo=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: smtp2go.com
smtp2go.com	0 DS RR in the parent zone found


	DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "fut2gispmh5bfctd5u42pscsvm2mepsk" between the hashed NSEC3-owner "fut2egitd1rmus3udli7r490sgrptct7" and the hashed NextOwner "fut2qhdivqps6shjfuctl1vcdo9in4jb". So the parent zone confirmes the not-existence of a DS RR. Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner fut2egitd1rmus3udli7r490sgrptct7.com., Algorithm: 13, 2 Labels, original TTL: 900 sec, Signature-expiration: 13.07.2026, 02:50:51 +, Signature-Inception: 06.07.2026, 01:40:51 +, KeyTag 27677, Signer-Name: com


	DS-Query in the parent zone sends valid NSEC3 RR with the Hash "ck0pojmg874ljref7efn8430qvit8bsm" as Owner. That's the Hash of "com" with the NextHashedOwnerName "ck0q3udg8cekkae7rukpgct1dvssh8ll". So that domain name is the Closest Encloser of "smtp2go.com". Opt-Out: True. Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner ck0pojmg874ljref7efn8430qvit8bsm.com., Algorithm: 13, 2 Labels, original TTL: 900 sec, Signature-expiration: 11.07.2026, 18:10:23 +, Signature-Inception: 04.07.2026, 17:00:23 +, KeyTag 27677, Signer-Name: com


	0 DNSKEY RR found




Zone: spf.smtp2go.com
spf.smtp2go.com	0 DS RR in the parent zone found


	0 DNSKEY RR found




Zone: www.spf.smtp2go.com
www.spf.smtp2go.com	0 DS RR in the parent zone found

3. Name Servers

Domain	Nameserver	NS-IP
www.spf.smtp2go.com	• ns2.smtpcorp.com
spf.smtp2go.com	• ns2.smtpcorp.com	185.3.94.65 London/England/United Kingdom (GB) - Akamai Technologies, Inc.	•
smtp2go.com	• ns2.smtpcorp.com	185.3.94.65 London/England/United Kingdom (GB) - Akamai Technologies, Inc.	•
	• ns4.smtpcorp.com	45.79.143.133 Cedar Knolls/New Jersey/United States (US) - Akamai Technologies, Inc.	•
	• sns1.treshna.co.nz	198.74.56.28 Cedar Knolls/New Jersey/United States (US) - Akamai Technologies, Inc.	•
	• sns2.treshna.co.nz	185.3.94.65 London/England/United Kingdom (GB) - Akamai Technologies, Inc.	•
	• sns3.treshna.co.nz	45.79.143.133 Cedar Knolls/New Jersey/United States (US) - Akamai Technologies, Inc.	•
	• sns4.treshna.co.nz	198.74.56.28 Cedar Knolls/New Jersey/United States (US) - Akamai Technologies, Inc.	•
com	• a.gtld-servers.net / nnn1-par6		•
	• b.gtld-servers.net / nnn1-elwaw4		•
	• c.gtld-servers.net / nnn1-par6		•
	• d.gtld-servers.net / nnn1-par6		•
	• e.gtld-servers.net / nnn1-defra-5		•
	• f.gtld-servers.net / nnn1-defra-4		•
	• g.gtld-servers.net / nnn1-defra-4		•
	• h.gtld-servers.net / nnn1-defra-4		•
	• i.gtld-servers.net / nnn1-defra-4		•
	• j.gtld-servers.net / nnn1-frmrs-2		•
	• k.gtld-servers.net / nnn1-ein2		•
	• l.gtld-servers.net / nnn1-frmrs-2		•
	• m.gtld-servers.net / nnn1-frmrs-2		•

4. SOA-Entries

Domain:	com
Zone-Name:	com
Primary:	a.gtld-servers.net
Mail:	nstld.verisign-grs.com
Serial:	1783465376
Refresh:	1800
Retry:	900
Expire:	604800
TTL:	900
num Entries:	9

Domain:	com
Zone-Name:	com
Primary:	a.gtld-servers.net
Mail:	nstld.verisign-grs.com
Serial:	1783465386
Refresh:	1800
Retry:	900
Expire:	604800
TTL:	900
num Entries:	4

Domain:	smtp2go.com
Zone-Name:	smtp2go.com
Primary:	ns2.smtpcorp.com
Mail:	hostmaster.smtp2go.com
Serial:	2026070204
Refresh:	14400
Retry:	3600
Expire:	1209600
TTL:	900
num Entries:	6

Domain:	spf.smtp2go.com
Zone-Name:	smtp2go.com
Primary:	ns2.smtpcorp.com
Mail:	hostmaster.smtp2go.com
Serial:	2026070204
Refresh:	14400
Retry:	3600
Expire:	1209600
TTL:	900
num Entries:	1

Domain:	www.spf.smtp2go.com
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	1

5. Screenshots

No Screenshot listed, because no url-check with https + http status 200-299, 400-599 + not-ACME-check found.

6. Url-Checks

Domainname	Http-Status	redirect	Sec.	G
•

7. Comments

	1. General Results, most used to calculate the result
A	name "spf.smtp2go.com" is subdomain, public suffix is ".com", top-level-domain is ".com", top-level-domain-type is "generic", tld-manager is "VeriSign Global Registry Services", num .com-domains preloaded: 108094 (complete: 276475)
A	Good: No asked Authoritative Name Server had a timeout
A	DNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
	HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
B	No _mta-sts TXT record found (mta-sts: Mail Transfer Agent Strict Transport Security - see RFC 8461). Read the result of server-daten.de (Url-Checks, Comments, Connections and DomainServiceRecords) to see a complete definition. Domainname: _mta-sts.spf.smtp2go.com
	2. Header-Checks
U		No https result with http status 2 or 4 (standard-check) found, no header checked.
	3. DNS- and NameServer - Checks
A	Info:: 51 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 6 Name Servers.
A	Info:: 51 Queries complete, 51 with IPv6, 0 with IPv4.
A	Good: All DNS Queries done via IPv6.
	Bad (greater 8):: An average of 8.5 queries per domain name server required to find all ip addresses of all name servers.
A	Info:: 6 different Name Servers found: ns2.smtpcorp.com, ns4.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, sns4.treshna.co.nz, 4 Name Servers included in Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, 4 Name Servers included in 1 Zone definitions: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz, 1 Name Servers listed in SOA.Primary: ns2.smtpcorp.com.
A	Good: Only one SOA.Primary Name Server found.: ns2.smtpcorp.com.
A	Good: SOA.Primary Name Server included in the delegation set.: ns2.smtpcorp.com.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: ns2.smtpcorp.com (185.3.94.65): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: ns4.smtpcorp.com (45.79.143.133): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: sns1.treshna.co.nz (198.74.56.28): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: sns2.treshna.co.nz (185.3.94.65): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: sns3.treshna.co.nz (45.79.143.133): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
X	Fatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: sns4.treshna.co.nz (198.74.56.28): Delegation: ns2.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, Zone: ns2.smtpcorp.com, ns4.smtpcorp.com, sns3.treshna.co.nz, sns4.treshna.co.nz. Name Servers defined in Delegation, missing in Zone: sns1.treshna.co.nz, sns2.treshna.co.nz.Name Servers defined in Zone, missing in Delegation: ns4.smtpcorp.com, sns4.treshna.co.nz.
A	Good: All Name Server Domain Names have a Public Suffix.
A	Good: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
A	Good: All Name Server ip addresses are public.
A	Good: Minimal 2 different name servers (public suffix and public ip address) found: 6 different Name Servers found
	Warning: No Name Server IPv6 address found. IPv6 is the future, so your name servers should be visible via IPv6.: 6 different Name Servers found
A	Good: Name servers with different Top Level Domains / Public Suffix List entries found: 6 Name Servers, 2 Top Level Domains: com, co.nz
A	Good: Name Servers with different domain names found.: 2 different Domains found
A	Good: Name servers with different Country locations found: 6 Name Servers, 2 Countries: GB, US
A	Info: Ipv4-Subnet-list: 6 Name Servers, 3 different subnets (first Byte): 185., 198., 45., 3 different subnets (first two Bytes): 185.3., 198.74., 45.79., 3 different subnets (first three Bytes): 185.3.94., 198.74.56., 45.79.143.
A	Good: Name Server IPv4-addresses from different subnet found:
A	Good: Nameserver supports TCP connections: 1 good Nameserver
A	Good: Nameserver supports Echo Capitalization: 1 good Nameserver
A	Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 1 good Nameserver
A	Good: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 1 good Nameserver
	Nameserver doesn't pass all EDNS-Checks: ns2.smtpcorp.com: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
A	Good: All SOA have the same Serial Number
	Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.
	4. Content- and Performance-critical Checks
A	Good: Domainname is not on the "Specially Designated Nationals And Blocked Persons List" (SDN). That's an US-list of individuals and companies owned or controlled by, or acting for or on behalf of, targeted countries. It also lists individuals, groups, and entities, such as terrorists and narcotics traffickers designated under programs that are not country-specific. Collectively, such individuals and companies are called "Specially Designated Nationals" or "SDNs." Their assets are blocked and U.S. persons are generally prohibited from dealing with them. So if a domain name is on that list, it's impossible to create a Letsencrypt certificate with that domain name. Check the list manual - https://www.treasury.gov/resource-center/sanctions/sdn-list/pages/default.aspx
A	Duration: 72803 milliseconds, 72.803 seconds

8. Connections

No connection informations found. Perhaps only http - connections.

9. Certificates

No certificate informations found. Perhaps only http - connections.

10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

Issuer				last 7 days	active	num Certs
CN=Sectigo RSA Domain Validation Secure Server CA, O=Sectigo Limited, L=Salford, C=GB, ST=Greater Manchester				0	0	1

CertSpotter-Id	Issuer	not before	not after	Domain names	LE-Duplicate	next LE
7352675590 leaf cert	CN=Sectigo RSA Domain Validation Secure Server CA, O=Sectigo Limited, L=Salford, C=GB, ST=Greater Manchester	2024-05-20 00:00:00	2025-06-16 23:59:59	*.smtp2go.com, smtp2go.com - 2 entries

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months are listed

No CRT - CT-Log entries found

11. Html-Content - Entries

No Html-Content entries found. Only checked if https + status 200/401/403/404

12. Html-Parsing via https://validator.w3.org/nu/

No https result http status 200 and Content-Type text/html or text/xml found, no Html-Parsing - Check

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: ns2.smtpcorp.com, ns4.smtpcorp.com, sns1.treshna.co.nz, sns2.treshna.co.nz, sns3.treshna.co.nz, sns4.treshna.co.nz

QNr.	Domain	Type	NS used
1	com	NS	d.root-servers.net (2001:500:2d::d)
	Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
2	ns2.smtpcorp.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: ada.ns.cloudflare.com, augustus.ns.cloudflare.com
	Answer: ada.ns.cloudflare.com 108.162.192.54, 172.64.32.54, 173.245.58.54, 2606:4700:50::adf5:3a36, 2803:f800:50::6ca2:c036, 2a06:98c1:50::ac40:2036
	Answer: augustus.ns.cloudflare.com 108.162.195.2, 162.159.44.2, 172.64.35.2, 2606:4700:58::a29f:2c02, 2803:f800:50::6ca2:c302, 2a06:98c1:50::ac40:2302
3	ns4.smtpcorp.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: ada.ns.cloudflare.com, augustus.ns.cloudflare.com
	Answer: ada.ns.cloudflare.com 108.162.192.54, 172.64.32.54, 173.245.58.54, 2606:4700:50::adf5:3a36, 2803:f800:50::6ca2:c036, 2a06:98c1:50::ac40:2036
	Answer: augustus.ns.cloudflare.com 108.162.195.2, 162.159.44.2, 172.64.35.2, 2606:4700:58::a29f:2c02, 2803:f800:50::6ca2:c302, 2a06:98c1:50::ac40:2302
4	nz	NS	d.root-servers.net (2001:500:2d::d)
	Answer: ns1.dns.net.nz, ns2.dns.net.nz, ns3.dns.net.nz, ns4.dns.net.nz, ns5.dns.net.nz, ns6.dns.net.nz, ns7.dns.net.nz
5	sns1.treshna.co.nz	NS	ns2.dns.net.nz (2001:dce:7000:2::130)
	Answer: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com
6	sns2.treshna.co.nz	NS	ns2.dns.net.nz (2001:dce:7000:2::130)
	Answer: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com
7	sns3.treshna.co.nz	NS	ns2.dns.net.nz (2001:dce:7000:2::130)
	Answer: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com
8	sns4.treshna.co.nz	NS	ns2.dns.net.nz (2001:dce:7000:2::130)
	Answer: ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com
9	ns1.linode.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-249.akam.net, a12-65.akam.net, a16-64.akam.net, a3-67.akam.net, a4-64.akam.net, a7-65.akam.net
10	ns2.linode.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-249.akam.net, a12-65.akam.net, a16-64.akam.net, a3-67.akam.net, a4-64.akam.net, a7-65.akam.net
11	ns3.linode.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-249.akam.net, a12-65.akam.net, a16-64.akam.net, a3-67.akam.net, a4-64.akam.net, a7-65.akam.net
12	ns4.linode.com	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-249.akam.net, a12-65.akam.net, a16-64.akam.net, a3-67.akam.net, a4-64.akam.net, a7-65.akam.net
13	net	NS	b.root-servers.net (2001:500:200::b)
	Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
14	a1-249.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
15	a12-65.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
16	a16-64.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
17	a3-67.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
18	a4-64.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
19	a7-65.akam.net	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: a1-67.akam.net, a11-67.akam.net, a12-67.akam.net, a18-67.akam.net, a22-67.akam.net, a28-67.akam.net, a4-67.akam.net, a6-67.akam.net
	Answer: a1-67.akam.net 193.108.91.67, 2600:1401:2::43
	Answer: a11-67.akam.net 2600:1480:1::43, 84.53.139.67
	Answer: a12-67.akam.net 184.26.160.67, 2600:1480:f000::43
	Answer: a18-67.akam.net 2600:1480:4800::43, 95.101.36.67
	Answer: a22-67.akam.net 23.211.61.67, 2600:1480:7800::43
	Answer: a28-67.akam.net 2600:1480:d800::43, 95.100.173.67
	Answer: a4-67.akam.net 2600:1480:9000::43, 72.246.46.67
	Answer: a6-67.akam.net 23.211.133.67, 2600:1401:1::43
20	a1-249.akam.net: 193.108.91.249	A	a1-67.akam.net (2600:1401:2::43)
21	a1-249.akam.net: 2600:1401:2::f9	AAAA	a1-67.akam.net (2600:1401:2::43)
22	ns1.linode.com: 92.123.94.2	A	a1-249.akam.net (2600:1401:2::f9)
23	ns1.linode.com: 2600:14c0:6::2	AAAA	a1-249.akam.net (2600:1401:2::f9)
24	ns2.linode.com: 92.123.94.3	A	a1-249.akam.net (2600:1401:2::f9)
25	ns2.linode.com: 2600:14c0:6::3	AAAA	a1-249.akam.net (2600:1401:2::f9)
26	ns3.linode.com: 92.123.95.3	A	a1-249.akam.net (2600:1401:2::f9)
27	ns3.linode.com: 2600:14c0:7::3	AAAA	a1-249.akam.net (2600:1401:2::f9)
28	ns4.linode.com: 92.123.95.4	A	a1-249.akam.net (2600:1401:2::f9)
29	ns4.linode.com: 2600:14c0:7::4	AAAA	a1-249.akam.net (2600:1401:2::f9)
30	a12-65.akam.net: 184.26.160.65	A	a1-67.akam.net (2600:1401:2::43)
31	a12-65.akam.net: 2600:1480:f000::41	AAAA	a1-67.akam.net (2600:1401:2::43)
32	a16-64.akam.net: 23.211.132.64	A	a1-67.akam.net (2600:1401:2::43)
33	a16-64.akam.net: 2600:1406:1b::40	AAAA	a1-67.akam.net (2600:1401:2::43)
34	a3-67.akam.net: 96.7.49.67	A	a1-67.akam.net (2600:1401:2::43)
35	a3-67.akam.net: 2600:1408:1c::43	AAAA	a1-67.akam.net (2600:1401:2::43)
36	a4-64.akam.net: 72.246.46.64	A	a1-67.akam.net (2600:1401:2::43)
37	a4-64.akam.net: 2600:1480:9000::40	AAAA	a1-67.akam.net (2600:1401:2::43)
38	a7-65.akam.net: 23.61.199.65	A	a1-67.akam.net (2600:1401:2::43)
39	a7-65.akam.net: 2600:1406:32::41	AAAA	a1-67.akam.net (2600:1401:2::43)
40	ns2.smtpcorp.com: 185.3.94.65	A	ada.ns.cloudflare.com (2606:4700:50::adf5:3a36)
41	ns2.smtpcorp.com: No AAAA record found	AAAA	ada.ns.cloudflare.com (2606:4700:50::adf5:3a36)
42	ns4.smtpcorp.com: 45.79.143.133	A	ada.ns.cloudflare.com (2606:4700:50::adf5:3a36)
43	ns4.smtpcorp.com: No AAAA record found	AAAA	ada.ns.cloudflare.com (2606:4700:50::adf5:3a36)
44	sns1.treshna.co.nz: 198.74.56.28	A	ns1.linode.com (2600:14c0:6::2)
45	sns1.treshna.co.nz: No AAAA record found	AAAA	ns1.linode.com (2600:14c0:6::2)
46	sns2.treshna.co.nz: 185.3.94.65	A	ns1.linode.com (2600:14c0:6::2)
47	sns2.treshna.co.nz: No AAAA record found	AAAA	ns1.linode.com (2600:14c0:6::2)
48	sns3.treshna.co.nz: 45.79.143.133	A	ns1.linode.com (2600:14c0:6::2)
49	sns3.treshna.co.nz: No AAAA record found	AAAA	ns1.linode.com (2600:14c0:6::2)
50	sns4.treshna.co.nz: 198.74.56.28	A	ns1.linode.com (2600:14c0:6::2)
51	sns4.treshna.co.nz: No AAAA record found	AAAA	ns1.linode.com (2600:14c0:6::2)

14. CAA - Entries

Domainname	Value	∑ Queries
spf.smtp2go.com	no CAA entry found	1
smtp2go.com	no CAA entry found	1
com	no CAA entry found	1

15. TXT - Entries

Domainname	TXT Entry	Status	∑ Queries
smtp2go.com	facebook-domain-verification=pdmbr1cb56arylrd3m54nn6vd3xub7	ok	1
smtp2go.com	google-site-verification=soeGlTttTYwUL2pNnJrZhPKlEkv_1ldMmCeoQe1ZkBA	ok	1
smtp2go.com	v=spf1 ip4:210.48.71.200 ip4:210.48.71.172 ip4:50.56.72.228 ip4:210.48.71.198/30 ip4:50.57.187.177 ip4:167.89.2.95 include:mail.zendesk.com include:spf.smtp2go.com include:_spf.google.com -all	ok	1
spf.smtp2go.com	v=spf1 ip4:207.58.147.64/28 ip4:216.22.15.224/27 ip4:43.228.184.0/22 ip4:103.47.204.0/22 ip4:103.2.140.0/22 ip4:203.31.36.0/22 ip4:170.10.68.0/22 ip4:158.120.80.0/21 ip4:66.235.120.0/21 ip4:194.195.251.175 ~all	ok	1
_acme-challenge.spf.smtp2go.com		Name Error - The domain name does not exist	1
_acme-challenge.spf.smtp2go.com.smtp2go.com			1
_acme-challenge.spf.smtp2go.com.spf.smtp2go.com		Name Error - The domain name does not exist	1

16. DomainService - Entries

Type	Domain	Pref	Value	DNS-error	num Answers	Status	Description
SPF	TXT	spf.smtp2go.com		v=spf1 ip4:207.58.147.64/28 ip4:216.22.15.224/27 ip4:43.228.184.0/22 ip4:103.47.204.0/22 ip4:103.2.140.0/22 ip4:203.31.36.0/22 ip4:170.10.68.0/22 ip4:158.120.80.0/21 ip4:66.235.120.0/21 ip4:194.195.251.175 ~all			ok

Type

Domain

Pref

Value

DNS-error

num Answers

Status

Description

SPF

TXT

spf.smtp2go.com

v=spf1 ip4:207.58.147.64/28 ip4:216.22.15.224/27 ip4:43.228.184.0/22 ip4:103.47.204.0/22 ip4:103.2.140.0/22 ip4:203.31.36.0/22 ip4:170.10.68.0/22 ip4:158.120.80.0/21 ip4:66.235.120.0/21 ip4:194.195.251.175 ~all

17. Cipher Suites

No Ciphers found

18. Portchecks

No open Ports <> 80 / 443 found, so no additional Ports checked.

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