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75
Total
70
DNS
65
Email
69
Security
65
Network
100
Availability
Domainmarc.info
IPv43
IPv60
MX records2
StatusActive
Domain technical report

MARC: Mailing list ARChives

marc.info

Generated: 2026-08-10T15:54:29-05:00 · Cached result

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IPv43
IPv60
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

3 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 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

2 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

✓
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

205 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: marc.info.226.33.71.in-addr.arpa

✓
IPv4 diversity35 / 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/1.1 204 No Content

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

3 record(s)
71.33.226.60
71.33.226.59
205.134.191.174

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
10 mail.marc.info.
50 pukcab.korelogic.com.

TXT

2 record(s)
"v=spf1 mx a:mail.marc.info a:pukcab.korelogic.com ~all"
"google-site-verification=NrcMNGnL9oS-NjMncKW7oSk1cAvkUDdnhhH3KtiefUM"

NS

2 record(s)
ns5.korelogic.com.
ns3.korelogic.com.

SOA

1 record(s)
ns3.korelogic.com. root.marc.info. 2026072902 14400 3600 604800 14400

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 mx a:mail.marc.info a:pukcab.korelogic.com ~all

DMARC

Not configured
—

Not configured

DKIM

Selector mail
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1g6ql56ufdewCRldNcQjmFv9Q+ROi7M86+OSBgrw3EbfPnMhQQFn6wULCTuMcE4oSL/aJUTYsNVDqzR3QNe42+8DEjh0PTvbXkr2ogpUGfOrTfRYkgDaMk0Y7IuVKhAtNEGOY1g84KlJl9wh8ZzhzgkbccuMtcPKsoCscZXrXhQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
MARC: Mailing list ARChives
Description
Final URL
https://marc.info/
HTTP status
200

HTTP

Status
HTTP/1.1 204 No Content
Final URL
https://marc.info/
Version
2
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Sectigo Limited
CN
marc.info
Valid from
2026-02-07T18:00:00-06:00
Valid until
2027-03-03T17:59:59-06:00
Days remaining
205
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

1 active
✓
HSTSImplemented
—
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
205.134.191.174, 71.33.226.59, 71.33.226.60
90,33 ms
Cloudflare
1.1.1.1
205.134.191.174, 71.33.226.59, 71.33.226.60
58,53 ms
Quad9
9.9.9.9
205.134.191.174, 71.33.226.59, 71.33.226.60
50,89 ms
OpenDNS
208.67.222.222
205.134.191.174, 71.33.226.59, 71.33.226.60
228,38 ms
AdGuard
94.140.14.14
205.134.191.174, 71.33.226.59, 71.33.226.60
284,31 ms

IP, geolocation and ASNAssociated network information

71.33.226.60

No data
success
No
country
region
city
asn
organization
isp

71.33.226.59

No data
success
No
country
region
city
asn
organization
isp

205.134.191.174

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mail.marc.info

Port 25: Closed/unreachable - 49.5 ms - 
Port 465: Closed/unreachable - 25.9 ms - 
Port 587: Closed/unreachable - 4062.6 ms -

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