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Total

DNS

Email

Security

Network

100

Availability

Domainsmtp2go.com

IPv41

IPv60

MX records5

StatusActive

Domain technical report

SMTP2GO: Reliable & Scalable Email Delivery Service & API

smtp2go.com

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Generated: 2026-08-09T15:18:02-05:00 · Cached result

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IPv41

IPv60

MX5

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

5 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

123 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: do-not-use-this.mail4.exim.smtpcorp.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

43.228.184.5

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

10 alt3.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
10 alt4.aspmx.l.google.com.
1 aspmx.l.google.com.

TXT

3 record(s)

"facebook-domain-verification=pdmbr1cb56arylrd3m54nn6vd3xub7"
"google-site-verification=soeGlTttTYwUL2pNnJrZhPKlEkv_1ldMmCeoQe1ZkBA"
"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"

NS

4 record(s)

sns4.treshna.co.nz.
ns4.smtpcorp.com.
ns2.smtpcorp.com.
sns3.treshna.co.nz.

SOA

1 record(s)

ns2.smtpcorp.com. hostmaster.smtp2go.com. 2026070211 14400 3600 1209600 900

SPF

Configured

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

DMARC

Configured

v=DMARC1; p=reject; pct=100; fo=1; ri=3600; rua=mailto:a.qxn2hfs8@sdmarc.net,mailto:w1lk2jq7@ag.dmarcian.com; ruf=mailto:w1lk2jq7@fr.dmarcian.com

DKIM

Selector google

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzFsT/XZgbAHUJ7iu8SrFygWm15XS9vuTEj85fWh4iRHpk1/z6IgQ56rmr/aUPpkiS53n+MJf12OhJ5nGzvmMKuNtSVGyysj2za1m6lFDiL0O+LD//bd65ynRxVQ/r3pqnG46ehw4iqpajV1o18nKolkfFgwBqYsY50CnBIZYdR4Vgjl4PSurgkD2SNc76wVC554FKq8DfzV1EUU7HZDjQHQfpOIRnYfBWhN2LGblW0976we4CkXMBhXcaU9nQ9jL7bL7/pczG/VhibY7jUyZ98eyqanVjWJyNaCOrvzDGaYhwwtr22bPVlAex9/rRnt6MglB/9CJAEOjM7AWVhUeXwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

SMTP2GO: Reliable & Scalable Email Delivery Service & API

Description

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Final URL

https://www.smtp2go.com/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.smtp2go.com/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

*.smtp2go.com

Valid from

2026-05-25T19:00:00-05:00

Valid until

2026-12-10T17:59:59-06:00

Days remaining

123

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

43.228.184.5

34,61 ms

Cloudflare

1.1.1.1

43.228.184.5

19,01 ms

Quad9

9.9.9.9

43.228.184.5

67,34 ms

OpenDNS

208.67.222.222

43.228.184.5

71,55 ms

AdGuard

94.140.14.14

43.228.184.5

43,51 ms

IP, geolocation and ASNAssociated network information

43.228.184.5

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

alt3.aspmx.l.google.com

Port 25: Closed/unreachable - 0.7 ms - 
Port 465: Closed/unreachable - 4021 ms - 
Port 587: Closed/unreachable - 4013.8 ms -

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