Trust map for u-tokyo.ac.jp

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DNS lookup
Every record for a domain, blocklists for an IP
Trust map
Every domain your email depends on
Find lookalikes
Names registered to look like yours

Write records
Tick who sends as you, get the records
Route to Refused
Safe, tested steps to refuse forged mail
Try a change
Preview an edit before you publish
Check DNS changes
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Trace an email
Paste headers to see a message's route
Read DMARC reports
Provider XML reports, made readable

Check a fleet
Up to 25 domains in one table, worst first
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Up to 4 domains side by side
Badges and API
README badge, JSON and a CI check

Find risks

DNS lookup
Every record for a domain, blocklists for an IP
Trust map
Every domain your email depends on
Find lookalikes
Names registered to look like yours

Fix records

Write records
Tick who sends as you, get the records
Route to Refused
Safe, tested steps to refuse forged mail
Try a change
Preview an edit before you publish
Check DNS changes
See who has your new record yet

Read your mail

Trace an email
Paste headers to see a message's route
Read DMARC reports
Provider XML reports, made readable

Many domains

Check a fleet
Up to 25 domains in one table, worst first
Compare
Up to 4 domains side by side
Badges and API
README badge, JSON and a CI check

Scoreboard

Full report for u-tokyo.ac.jp

u-tokyo.ac.jp's email depends on no outside domains.

Asking 1 registry for registration dates.

Registration dates never change the grade; most domains renew automatically.

u-tokyo.ac.jp

Your own domain

Every route on this map starts here. Whoever controls this registration controls all your mail.

Registration

Looking up the date

Asking the registry.

Open the full report

Sending

This SPF record names only your own servers.

Receiving

Mail comes to your own servers.

Reports

Reports stay on your own domain.

Built from SPF, MX and DMARC report addresses. Your DNS host and DKIM services are not shown, as public DNS does not list them. This shows what is at stake, not current risk.

Reading the records…

Trust map for u-tokyo.ac.jp | Stamp