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tlu.edu

Email infrastructure report · Last checked

Summary

tlu.edu uses Microsoft 365 for email and has SPF, DKIM, and DMARC configured. It is not catch-all.

Mail provider

ProviderMicrosoft 365 business
Primary MXtlu-edu.mail.protection.outlook.com

MX records

PriorityHostnameIPs
10tlu-edu.mail.protection.outlook.com52.101.9.24, 52.101.41.0, 52.101.40.2, 52.101.41.180, 2a01:111:f403:f802::3, 2a01:111:f403:c902::4, 2a01:111:f403:f910::, 2a01:111:f403:f90f::

Authentication

SPF✓ Present -all
DKIM✓ Found (selectors: selector1, s1, s2)
DMARC✓ Present p=none
Raw SPF record
v=spf1 include:spf.protection.outlook.com include:_spf.qualtrics.com ip4:209.184.108.19 ip4:209.184.108.26 include:amazonses.com include:servers.mcsv.net -all
Raw DMARC record
v=DMARC1; p=none; pct=100; rua=mailto:dmarc@tlu.edu; ruf=mailto:dmarc@tlu.edu; fo=1

Email behavior

Catch-all✗ No
Disposable✗ No
Free provider✗ No
STARTTLS✓ Supported
SMTP response328ms
SMTP banner220 CY4PEPF0000E9D9.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 28 Jul 2026 15:00:07 +0000 [08DEE87C564E077E]

What this means

This domain has strong email authentication. Messages claiming to come from @tlu.edu can be cryptographically verified by recipients, making spoofing difficult. Deliverability for legitimate mail should be good.

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curl https://api.checkmail.dev/v1/verify \
  -G --data-urlencode "email=test@tlu.edu" \
  -H "Authorization: Bearer cm_live_..."