Email infrastructure of doku.com
According to Live Direct Marketing's daily DNS scan (September 7, 2026), doku.com (Tranco rank #52,807) points its inbound MX to Google Workspace and authorizes Mandrill, HubSpot, Alibaba DirectMail (APAC) in SPF. Its observed DMARC policy is p=quarantine. Across this dataset, 47% of DMARC publishers use an enforcing policy; this does not show where a specific message landed.
Last updated: .
| Mailbox provider (MX) | Google Workspace |
|---|---|
| ESPs in SPF | Mandrill, HubSpot, Alibaba DirectMail (APAC), Mailchimp |
| SaaS senders in SPF | none detected |
| DMARC policy | p=quarantine |
| DMARC record | v=DMARC1;p=quarantine;pct=100; |
| Tranco rank | #52,807 |
| Snapshot | 2026-09-07 (updated daily) |
Keep an eye on doku.com
Get a first health report, then meaningful changes to SPF, DMARC, MX, sampled MX PTR and blocklists. See your domain history and run a real inbox placement test from your private watchlist.
Manage existing subscriptions →How doku.com compares
Same daily dataset, three views: how its mailbox provider is trending, how strict DMARC is at its position in the list, and where its own policy sits among all DMARC publishers in the dataset.
Market share of Google Workspace
DMARC enforced by list position
Policy maturity of all DMARC publishers
From observation to a useful check
- What was observed
- The DNS records and classifications in this snapshot.
- What it means
- MX describes inbound mail; SPF authorizes senders.
- What is unknown
- The actual sending IP, nested SPF dependencies, inbox placement and commercial relationships. MTA-STS, TLS-RPT and BIMI adoption are not measured.
- Next check
- Verify current DNS and test a real message: run an inbox placement test.
DNS records
Source: OpenINTEL / Tranco. Capture: 2026-09-07. These are answers from the measurement vantage point, not a live DNS check. TTL is the observed cache lifetime in seconds.
doku.com · A — Answer records observed
IPv4 addresses for this name. They do not identify the mail server or prove a hosting migration.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- doku.com · A · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
23.38.20.26
doku.com · AAAA — Answer records observed
IPv6 addresses for this name. An address record does not test service availability.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- doku.com · AAAA · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
2a02:26f0:1180:187::23a9 - doku.com · AAAA · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
2a02:26f0:1180:18b::23a9
doku.com · NS — Answer records observed
Name servers listed for the DNS zone.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a1-73.akam.net. - doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a16-64.akam.net. - doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a18-65.akam.net. - doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a3-66.akam.net. - doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a4-67.akam.net. - doku.com · NS · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
a7-64.akam.net.
doku.com · MX — Answer records observed
Servers named to receive mail. Lower preference numbers are tried first.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
5 aspmx.l.google.com. - doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
10 alt1.aspmx.l.google.com. - doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
10 alt2.aspmx.l.google.com. - doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
15 aspmx2.googlemail.com. - doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
15 aspmx3.googlemail.com. - doku.com · MX · TTL 14400 s · 2026-09-07T00:54:35Z · AD=0
20 mxdm-ap-southeast-1.aliyun.com.
doku.com · SOA — Answer records observed
Zone administration data. The serial is a version number, not a creation date or clock.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- doku.com · SOA · TTL 86400 s · 2026-09-07T00:54:35Z · AD=0
expire=3600000; minimum=86400; mname=a1-73.akam.net.; refresh=86400; retry=7200; rname=hostmaster.akamai.com.; serial=2016062356
doku.com · CAA — Unknown: no conclusive answer in this capture
Rules for certificate issuance. These do not show whether an existing certificate is valid.
doku.com · TXT — Answer records observed
Text records can publish mail policies, domain-control challenges or other data.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
doku.com · TXT · TTL 300 s · 2026-09-07T00:54:35Z · AD=0"v=spf1 include:spfdm-ap-southeast-1.aliyun.com ip4:103.10.128.0/22 include:spf.mandrillapp.com include:44284973.spf01.hubspotemail.net include:servers.mcsv.net include:ncapp02.com include:_spf.google.com ~all"
doku.com · DNSKEY — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
doku.com · DS — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
doku.com · CDS — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
doku.com · CDNSKEY — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
www.doku.com · A — Answer records observed
IPv4 addresses for this name. They do not identify the mail server or prove a hosting migration.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- e9129.dscb.akamaiedge.net · A · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
23.222.37.67 - www.doku.com · CNAME · TTL 300 s · 2026-09-07T00:54:35Z · AD=0
www.doku.com.edgekey.net. - www.doku.com.edgekey.net · CNAME · TTL 21600 s · 2026-09-07T00:54:35Z · AD=0
e9129.dscb.akamaiedge.net.
www.doku.com · AAAA — Answer records observed
IPv6 addresses for this name. An address record does not test service availability.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
- e9129.dscb.akamaiedge.net · AAAA · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
2a02:26f0:6d00:586::23a9 - e9129.dscb.akamaiedge.net · AAAA · TTL 20 s · 2026-09-07T00:54:35Z · AD=0
2a02:26f0:6d00:58e::23a9 - www.doku.com · CNAME · TTL 300 s · 2026-09-07T00:54:35Z · AD=0
www.doku.com.edgekey.net. - www.doku.com.edgekey.net · CNAME · TTL 21600 s · 2026-09-07T00:54:35Z · AD=0
e9129.dscb.akamaiedge.net.
_dmarc.doku.com · TXT — Answer records observed
Text records can publish mail policies, domain-control challenges or other data.
Query observed at: 2026-09-07T00:54:35Z.
Response code: 0.
DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.doku.com · TXT · TTL 300 s · 2026-09-07T00:54:35Z · AD=0"v=DMARC1;p=quarantine;pct=100;"
DNSSEC records are shown only when returned. An unset AD flag is not proof that a zone is unsigned. MTA-STS, TLS-RPT, BIMI and arbitrary DKIM selectors are not measured here; their absence cannot be inferred.
Recorded DNS history
Registry presence: first seen 2026-04-28; last seen 2026-09-07. These are appearances in our domain registry, not domain registration dates or earlier DNS values.
This history starts with saved RR captures. Provider market-share charts are aggregate context, not this domain’s DNS history. Dates identify observations; no continuous validity between them is implied. Equivalent RR states are combined, ignoring response TTL and capture-time changes. Up to 30 distinct RR states and 60 dated captures are retained within a per-domain byte limit.
Recent observed differences
2026-09-05 → 2026-09-07
doku.com · A
Before: 2026-09-05 — Answer records observed
- doku.com · A
23.222.37.67
After: 2026-09-07 — Answer records observed
- doku.com · A
23.38.20.26
www.doku.com · AAAA
Before: 2026-09-05 — Answer records observed
- e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:1180:187::23a9 - e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:1180:18b::23a9 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
After: 2026-09-07 — Answer records observed
- e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:6d00:586::23a9 - e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:6d00:58e::23a9 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
Available saved snapshots
2026-09-07
Each query below keeps its own observation date; unknown checks may retain older values.
_dmarc.doku.com · TXT
2026-09-07 — Answer records observed
DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.doku.com · TXT"v=DMARC1;p=quarantine;pct=100;"
doku.com · A
2026-09-07 — Answer records observed
- doku.com · A
23.38.20.26
doku.com · AAAA
2026-09-07 — Answer records observed
- doku.com · AAAA
2a02:26f0:1180:187::23a9 - doku.com · AAAA
2a02:26f0:1180:18b::23a9
doku.com · MX
2026-09-07 — Answer records observed
- doku.com · MX
5 aspmx.l.google.com - doku.com · MX
10 alt1.aspmx.l.google.com - doku.com · MX
10 alt2.aspmx.l.google.com - doku.com · MX
15 aspmx2.googlemail.com - doku.com · MX
15 aspmx3.googlemail.com - doku.com · MX
20 mxdm-ap-southeast-1.aliyun.com
doku.com · NS
2026-09-07 — Answer records observed
- doku.com · NS
a1-73.akam.net - doku.com · NS
a16-64.akam.net - doku.com · NS
a18-65.akam.net - doku.com · NS
a3-66.akam.net - doku.com · NS
a4-67.akam.net - doku.com · NS
a7-64.akam.net
doku.com · SOA
2026-09-07 — Answer records observed
- doku.com · SOA
expire=3600000; minimum=86400; mname=a1-73.akam.net; refresh=86400; retry=7200; rname=hostmaster.akamai.com; serial=2016062356
doku.com · TXT
2026-09-07 — Answer records observed
SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
doku.com · TXT"v=spf1 include:spfdm-ap-southeast-1.aliyun.com ip4:103.10.128.0/22 include:spf.mandrillapp.com include:44284973.spf01.hubspotemail.net include:servers.mcsv.net include:ncapp02.com include:_spf.google.com ~all"
www.doku.com · A
2026-09-07 — Answer records observed
- e9129.dscb.akamaiedge.net · A
23.222.37.67 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
www.doku.com · AAAA
2026-09-07 — Answer records observed
- e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:6d00:586::23a9 - e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:6d00:58e::23a9 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
2026-09-05
Each query below keeps its own observation date; unknown checks may retain older values.
_dmarc.doku.com · TXT
2026-09-05 — Answer records observed
DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.doku.com · TXT"v=DMARC1;p=quarantine;pct=100;"
doku.com · A
2026-09-05 — Answer records observed
- doku.com · A
23.222.37.67
doku.com · AAAA
2026-09-05 — Answer records observed
- doku.com · AAAA
2a02:26f0:1180:187::23a9 - doku.com · AAAA
2a02:26f0:1180:18b::23a9
doku.com · MX
2026-09-05 — Answer records observed
- doku.com · MX
5 aspmx.l.google.com - doku.com · MX
10 alt1.aspmx.l.google.com - doku.com · MX
10 alt2.aspmx.l.google.com - doku.com · MX
15 aspmx2.googlemail.com - doku.com · MX
15 aspmx3.googlemail.com - doku.com · MX
20 mxdm-ap-southeast-1.aliyun.com
doku.com · NS
2026-09-05 — Answer records observed
- doku.com · NS
a1-73.akam.net - doku.com · NS
a16-64.akam.net - doku.com · NS
a18-65.akam.net - doku.com · NS
a3-66.akam.net - doku.com · NS
a4-67.akam.net - doku.com · NS
a7-64.akam.net
doku.com · SOA
2026-09-05 — Answer records observed
- doku.com · SOA
expire=3600000; minimum=86400; mname=a1-73.akam.net; refresh=86400; retry=7200; rname=hostmaster.akamai.com; serial=2016062356
doku.com · TXT
2026-09-05 — Answer records observed
SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
doku.com · TXT"v=spf1 include:spfdm-ap-southeast-1.aliyun.com ip4:103.10.128.0/22 include:spf.mandrillapp.com include:44284973.spf01.hubspotemail.net include:servers.mcsv.net include:ncapp02.com include:_spf.google.com ~all"
www.doku.com · A
2026-09-05 — Answer records observed
- e9129.dscb.akamaiedge.net · A
23.222.37.67 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
www.doku.com · AAAA
2026-09-05 — Answer records observed
- e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:1180:187::23a9 - e9129.dscb.akamaiedge.net · AAAA
2a02:26f0:1180:18b::23a9 - www.doku.com · CNAME
www.doku.com.edgekey.net - www.doku.com.edgekey.net · CNAME
e9129.dscb.akamaiedge.net
Changes to doku.com
No entry for this domain appears in the current public change feed. The feed is a selected sample, so this does not establish that its DNS stayed unchanged.
Start monitoring to build a history from your first check, or explore observed changes across the dataset.
SPF diagnostics
Static observations from the published SPF record. No nested include or redirect dependencies were evaluated. The actual sending IP and evaluation path are needed to assess the RFC 7208 limit of 10 DNS-dependent terms.
Modern mail security across the dataset
The required DNS labels are not queried. Adoption is unknown for this domain and for the population. Apex TXT anomalies are listed separately in the security posture report.
Reverse DNS of inbound MX hosts
These are separately dated observations of inbound MX addresses. They do not identify the actual sending IP. To assess outbound mail, check current forward and reverse DNS of the actual sending IP; FCrDNS and delivery were not measured here.
Showing 5 of 6 inbound MX hostnames.
aspmx.l.google.com
PTR records were observed for all returned addresses of this MX.
DNS attempt: 2026-09-07 05:30:17 UTC. 2 of 2 addresses queried; 2 definite address results in the saved observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
173.194.79.26 | eg-in-f26.1e100.net | PTR observed |
2a00:1450:4013:c02::1b | ec-in-x1b.1e100.net | PTR observed |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
alt1.aspmx.l.google.com
PTR records were observed for all returned addresses of this MX.
DNS attempt: 2026-09-07 05:30:17 UTC. 2 of 2 addresses queried; 2 definite address results in the saved observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
172.253.148.27 | yuskedq-in-f27.1e100.net | PTR observed |
2a00:1450:4025:4401::1a | yuskedq-in-f26.1e100.net | PTR observed |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
The observed IP 172.253.148.27 is also associated with 4 other MX hostnames. Outbound use and reputation were not measured.
alt2.aspmx.l.google.com
PTR records were observed for all returned addresses of this MX.
DNS attempt: 2026-09-07 05:30:17 UTC. 2 of 2 addresses queried; 2 definite address results in the saved observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
142.250.147.27 | rd-in-f27.1e100.net | PTR observed |
2a00:1450:4025:c01::1b | rd-in-f27.1e100.net | PTR observed |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
The observed IP 142.250.147.27 is also associated with 2 other MX hostnames. Outbound use and reputation were not measured.
aspmx2.googlemail.com
PTR records were observed for all returned addresses of this MX.
DNS attempt: 2026-09-07 05:30:17 UTC. 2 of 2 addresses queried; 2 definite address results in the saved observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
172.253.148.27 | yuskedq-in-f27.1e100.net | PTR observed |
2a00:1450:4025:4401::1b | yuskedq-in-f27.1e100.net | PTR observed |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
The observed IP 172.253.148.27 is also associated with 4 other MX hostnames. Outbound use and reputation were not measured.
aspmx3.googlemail.com
PTR records were observed for all returned addresses of this MX.
DNS attempt: 2026-09-07 05:30:17 UTC. 2 of 2 addresses queried; 2 definite address results in the saved observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
142.250.147.26 | rd-in-f26.1e100.net | PTR observed |
2a00:1450:4025:c01::1a | rd-in-f26.1e100.net | PTR observed |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
The observed IP 142.250.147.26 is also associated with 4 other MX hostnames. Outbound use and reputation were not measured.
Where doku.com stands
The same snapshot cut by zone, by list position and by how alive the published policies are.
- At this list position the top three mailbox providers hold 60.1% of domains (Google Workspace, Microsoft 365, Unknown / Other).
- Across the dataset 25.1% of DMARC records are inert — policy does nothing and no reports are collected.
How to interpret these observations
MX identifies the observed inbound mailbox or gateway. SPF includes identify services authorised to send for the domain. DMARC shows the published authentication policy. The dataset currently contains 3 populated signal groups for this page.
Observed deliverability context: based on the available observations, this page describes DNS configuration only. It does not represent a complete audit of doku.com and does not prove that a particular message reaches the inbox or spam folder.
Frequently asked questions
What email provider does doku.com use?
doku.com uses Google Workspace for inbound mail (detected from its primary MX record) as of September 7, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
What ESP does doku.com use?
doku.com authorises Mandrill, HubSpot, Alibaba DirectMail (APAC), Mailchimp in its SPF record as of September 7, 2026.
Does doku.com enforce DMARC?
Partially — doku.com publishes p=quarantine (as of September 7, 2026).
Related domain statistics
Nearby domains in the Tranco ranking: nga.org · nlr.gov · zombeek.cz · esosuite.net
Browse provider data · Compare historical periods · Run an inbox placement test
Data: Email infrastructure of the Tranco top-1M, daily snapshot 2026-09-07, derived from OpenINTEL forward-DNS measurements. Cite with the date — records change daily.