hsl.harvard.edu

Valid Email Server
Domain Lookup › hsl.harvard.edu
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
hsl.harvard.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-25 17:06:31 UTC · ↺ Refresh

MX Hostnames

  • mailrelay2.hsl.harvard.edu
  • securemail.hsl.harvard.edu
  • mail.hrca.harvard.edu
  • itportal2.hsl.harvard.edu
  • citrix2.hsl.harvard.edu
  • mailrelay1.hsl.harvard.edu
  • allscripts2.hsl.harvard.edu

MX Priorities

  • securemail.hsl.harvard.edu: 10
  • citrix2.hsl.harvard.edu: 50
  • mail.hrca.harvard.edu: 20
  • mailrelay2.hsl.harvard.edu: 30
  • mailrelay1.hsl.harvard.edu: 40
  • itportal2.hsl.harvard.edu: 60
  • allscripts2.hsl.harvard.edu: 70

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 50.207.150.152 (no PTR)
  • 50.207.150.147 (no PTR)
  • 128.103.138.31 ↩ mail.hrca.harvard.edu
  • 128.103.138.88 ↩ mailrelay2.hsl.harvard.edu
  • 128.103.138.87 ↩ mailrelay1.hsl.harvard.edu

SOA Record

No SOA record found.

Nameservers (NS)

No nameservers found.

SPF Record

✓ Soft Fail (~all)
v=spf1 include:5143231.spf04.hubspotemail.net ip4:128.103.138.16 ip4:128.103.138.87 ip4:128.103.138.88 ip4:52.207.150.152 ip4:50.207.150.153 ip4:50.207.150.154 include:_spf.activedemand.com include:amazonses.com include:outboundmail.blackbaud.net ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

12 records
  • uber-domain-verification=b58e736b-20ed-4fe2-a51c-d616e9efed5e
  • openai-domain-verification=dv-96Z1d8W23hURXlUyRwX6AW9o
  • logmein-verification-code=7zrUzEK72y0K99RUhH78gN8At
  • anthropic-domain-verification-6gc2zd=ObCirsvw3nLxDqleVqLE2KQyT
  • zoho-verification=zb19219479.zmverify.zoho.com
  • SPFv=spf1 include:5143231.spf04.hubspotemail.net ip4:128.103.138.16 ip4:128.103.138.87 ip4:128.103.138.88 ip4:52.207.150.152 ip4:50.207.150.153 ip4:50.207.150.154 include:_spf.activedemand.com include:amazonses.com include:outboundmail.blackbaud.net ~all
  • _proofpoint-verification=15f066a2-d2be-4cd3-a87b-36767ec646e0
  • twilio-domain-verification=5d054364417b7e5ee50841b42b72c7dd
  • MS=ms19559671
  • atlassian-domain-verification=0W1n/yNFsSyr7bC7YexXSJCDXcwh/7EFh9HvLRfTm6/2eIA106mDTWcl4cNskpNX
  • duo_sso_verification=IIKrkVr6NZ5IAVJgY0tNBH3l2a5hIjy7WGsg9ulOTsXUTpbdXeCU7ig1PN9CHXps
  • ZOOM_verify_0R0D6hZoRbyHqlZpaGR-qQ
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