pobox.com

Checked 22 October 2026, 10:20 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · Gandi SAS · expires 2027-01-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
5 January 1995
Last changed
4 December 2025
Expires
4 January 2027
Status
client transfer prohibited
Registry nameservers
fmns1.messagingengine.com, fmns2.messagingengine.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-01-04 #3
    The registration is valid until 2027-01-04 (73 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

fmns1.messagingengine.com, fmns2.messagingengine.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
fmns1.messagingengine.com, fmns2.messagingengine.com
NS in the zone
fmns1.messagingengine.com, fmns2.messagingengine.com
NameserverAddressesNetwork (AS)Glue
fmns1.messagingengine.com162.159.24.253AS13335 CLOUDFLARENET - Cloudflare, Inc., US162.159.24.253
fmns2.messagingengine.com162.159.25.114AS13335 CLOUDFLARENET - Cloudflare, Inc., US162.159.25.114

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: fmns1.messagingengine.com, fmns2.messagingengine.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 2 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .com
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
fmns1.messagingengine.com 162.159.24.253NOERROR, 93 ms, authoritativenoyes / yesrefused2026.10.8
fmns2.messagingengine.com 162.159.25.114NOERROR, 92 ms, authoritativenoyes / yesrefused2026.10.8

Checks

  • ✓ All respond #14
    All 2 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: fmns1.messagingengine.com: "2026.10.8"; fmns2.messagingengine.com: "2026.10.8". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026102100 · primary fmns1.messagingengine.com

Found

Primary (MNAME)
fmns1.messagingengine.com
Contact (RNAME)
postmaster.messagingengine.com
Serial
2026102100
Refresh / retry
86277 s / 600 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
fmns1.messagingengine.com (162.159.24.253)2026102100
fmns2.messagingengine.com (162.159.25.114)2026102100

Checks

  • ✓ Serial 2026102100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 23h57m57s, retry 10m, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver fmns1.messagingengine.com is one of the listed nameservers.
  • ✓ Contact postmaster@messagingengine.com #25
    The SOA RNAME postmaster.messagingengine.com means postmaster@messagingengine.com.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

11 records at the apex

Found

Read from
162.159.24.253:53
TypeValueTTL
SOAfmns1.messagingengine.com. postmaster.messagingengine.com. 2026102100 86277 600 1209600 36003600
NSfmns1.messagingengine.com.3600
NSfmns2.messagingengine.com.3600
A103.168.172.653600
MX10 in1-smtp.messagingengine.com.3600
MX20 in2-smtp.messagingengine.com.3600
TXT"v=spf1 include:spf.messagingengine.com ~all"3600
CAA0 issue "digicert.com"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issuewild "digicert.com"3600
CAA0 issuewild "letsencrypt.org"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: digicert.com, letsencrypt.org.