CheckMail

unisimon.edu.co

Email infrastructure report · Last checked

Summary

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

Mail provider

ProviderMicrosoft 365 business
Primary MXunisimon-edu-co.mail.protection.outlook.com

MX records

PriorityHostnameIPs
1unisimon-edu-co.mail.protection.outlook.com52.101.41.183, 52.101.11.10, 52.101.10.1, 52.101.194.15, 2a01:111:f403:f907::1, 2a01:111:f403:f90f::1, 2a01:111:f403:f802::2, 2a01:111:f403:c91d::

Authentication

SPF✓ Present -all
DKIM✓ Found (selectors: selector1, selector2)
DMARC✓ Present p=reject
Raw SPF record
v=spf1 ip4:190.144.176.2 ip4:200.10.174.252 ip4:200.10.174.251 ip4:162.241.156.157 include:spf.mailjet.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.sealmail.co -all
Raw DMARC record
v=DMARC1; p=reject; pct=100; rua=mailto:monitoreo-redes-infra@unisimon.edu.co; ruf=mailto:monitoreo-redes-infra@unisimon.edu.co

Email behavior

Catch-all✗ No
Disposable✗ No
Free provider✗ No
STARTTLS✓ Supported
SMTP response243ms
SMTP banner220 CH3PEPF00000016.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 28 Jul 2026 18:43:18 +0000 [08DEECA6AFE45D4F]

What this means

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

Refresh this report

Cached results are kept indefinitely. If you think the data above is out of date, run a fresh check below. Refreshes are rate-limited (1 per domain every 5 minutes).

Want to verify individual addresses at unisimon.edu.co?

CheckMail's API verifies real-time deliverability with SMTP checks, not just DNS lookups. 100 free credits, no credit card required.

Get an API key → 
curl https://api.checkmail.dev/v1/verify \
  -G --data-urlencode "email=test@unisimon.edu.co" \
  -H "Authorization: Bearer cm_live_..."