smtc.com

Valid Email Server
Domain Lookup › smtc.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
smtc.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-18 15:09:55 UTC · ↺ Refresh

MX Hostnames

  • mxa-00887401.gslb.pphosted.com
  • mxb-00887401.gslb.pphosted.com

MX Priorities

  • mxb-00887401.gslb.pphosted.com: 10
  • mxa-00887401.gslb.pphosted.com: 10

A / AAAA Records

  • 54.208.101.55 ↩ ec2-54-208-101-55.compute-1.amazonaws.com

Mail Server IPs

  • 148.163.151.105 ↩ mx0a-00887401.pphosted.com
  • 148.163.155.50 ↩ mx0b-00887401.pphosted.com

SOA Record

Raw SOA custns1.allstream.net.smtc.com hostmaster.business.allstream.net 2025102701 10800 3600 2419200 900
Primary NS (mname)
custns1.allstream.net.smtc.com
Admin Email (rname)
hostmaster@business.allstream.net
Serial
2025102701
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
900s

Nameservers (NS)

ns2.business.allstream.net
ns1.business.allstream.net

SPF Record

✓ Strict (-all)
v=spf1 ip4:66.46.62.37 ip4:96.127.33.169 ip4:96.127.35.106 ip4:96.127.35.202 ip4:96.127.35.203 ip4:52.61.4.29 ip4:96.127.75.76 ip4:96.127.73.22 ip4:96.127.71.74 ip4:54.251.128.1 include:spf.protection.outlook.com include:docebosaas.com include:spf-00887401.pphosted.com include:securityeducation.com mx -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 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

8 records
  • 6lSZEGy5RUf7NWrEwGGBCfcU1gXGMTNp1O+o86Sb7CA==
  • V7LQx0W9dTqIZyN9xpSqDVPiapxptu9UvCp5uGbQ3H+6lSZEGy5RUf7NWrEwGGBCfcU1gXGMTNp1O+o86Sb7CA==
  • e59555b0518cf3628c0d9df82345913373e2d92d74aa1ee0be
  • SPFv=spf1 ip4:66.46.62.37 ip4:96.127.33.169 ip4:96.127.35.106 ip4:96.127.35.202 ip4:96.127.35.203 ip4:52.61.4.29 ip4:96.127.75.76 ip4:96.127.73.22 ip4:96.127.71.74 ip4:54.251.128.1 include:spf.protection.outlook.com include:docebosaas.com include:spf-00887401.pphosted.com include:securityeducation.com mx -all
  • duo_sso_verification=EicTqgfhHLF4i3ze4xbOBvIFVndXQvIWoQHkw1xVH3wTwaJUf5dAKwMw2fQ6NYyL
  • slack-domain-verification=YMtwTvLxk2pJMRQgGhhWUew6VQiNXjidLTIvbH13
  • MS=EF9E6524F937FA24B2E972DFBB07901A5757FB37
  • 0ed1fe018a589865f38b90487cad38a33a6ddca1c2
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