Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gtc.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 20:46:16 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt4.aspmx.l.google.com
- aspmx.l.google.com
MX Priorities
- alt4.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
A / AAAA Records
- 20.98.190.171
Mail Server IPs
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1b ↩ ws-in-x1b.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 192.178.155.26 ↩ yuiadrs-in-f26.1e100.net
- 2607:f8b0:4004:c1f::1b ↩ pd-in-f27.1e100.net
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
SOA Record
Raw SOA
ns-1466.awsdns-55.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1466.awsdns-55.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-53.awsdns-06.com
ns-871.awsdns-44.net
ns-1466.awsdns-55.org
ns-1837.awsdns-37.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.google.com include:gtc-edu.spf.smtp25.com include:servers.mcsv.net include:stspg-customer.com include:cust-spf.exacttarget.com include:spf.protection.outlook.com ip4:40.90.247.249 ip4:52.45.50.190 ip4:199.59.200.201 ip4:34.194.230.233 ip4:216.17.115.77 ip4:176.31.145.254 ip4:167.89.39.80 ip4:167.89.32.80 ip4:3.218.253.173 -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=reject
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject
DKIM Selectors
✓ 2 found
google._domainkey
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- ms-domain-verification=eefbfddd-ad8d-4c73-a237-225bb394926c
- status-page-domain-verification=2mt3gv1zqggz
- SPFv=spf1 include:_spf.google.com include:gtc-edu.spf.smtp25.com include:servers.mcsv.net include:stspg-customer.com include:cust-spf.exacttarget.com include:spf.protection.outlook.com ip4:40.90.247.249 ip4:52.45.50.190 ip4:199.59.200.201 ip4:34.194.230.233 ip4:216.17.115.77 ip4:176.31.145.254 ip4:167.89.39.80 ip4:167.89.32.80 ip4:3.218.253.173 -all
- _y4p3qkym1j42bi0cqoy7bv53dw1pmvb
- adobe-idp-site-verification=bde2c4cac1e150aa6270f0e6b00a5b3d969bd04369e37e657a1d6ddb682bcc1b
- anthropic-domain-verification-7fg3ec=I3jWZHnykuvuSEGVEFksZYl7J
- google-site-verification=gqReumJWWSlo7rIj7Qkq80-T9VCjb8bDMP-g_utBWW0
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