Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colab.re
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 00:00:08 UTC · ↺ Refresh
MX Hostnames
- aspmx3.googlemail.com
- alt1.aspmx.l.google.com
- aspmx.l.google.com
- alt2.aspmx.l.google.com
- aspmx2.googlemail.com
MX Priorities
- alt1.aspmx.l.google.com: 20
- alt2.aspmx.l.google.com: 20
- aspmx2.googlemail.com: 30
- aspmx3.googlemail.com: 30
- aspmx.l.google.com: 10
A / AAAA Records
- 54.215.203.172 ↩ ec2-54-215-203-172.us-west-1.compute.amazonaws.com
- 54.176.105.198
Mail Server IPs
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 142.251.16.27 ↩ bl-in-f27.1e100.net
- 2607:f8b0:4004:c08::1b ↩ bi-in-f27.1e100.net
SOA Record
Raw SOA
ns-1028.awsdns-00.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1028.awsdns-00.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-197.awsdns-24.com
ns-840.awsdns-41.net
ns-1028.awsdns-00.org
ns-1963.awsdns-53.co.uk
SPF Record
✓ Soft Fail (~all)
v=spf1 include:amazonses.com include:mail.zendesk.com include:_spf.google.com include:spf.mandrillapp.com include:_spf.rdstation.com.br ip4:54.240.35.192 ip4:54.240.35.193 ip4:54.240.35.194 ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=5; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 5% of failing messages only
DKIM Selectors
✓ 3 found
google._domainkey
s1._domainkey
s2._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
4 records- google-site-verification=hsCf56d3fr3-JxRmYekAoOuBd0sl4h8isZcXJstvAGg
- SPFv=spf1 include:amazonses.com include:mail.zendesk.com include:_spf.google.com include:spf.mandrillapp.com include:_spf.rdstation.com.br ip4:54.240.35.192 ip4:54.240.35.193 ip4:54.240.35.194 ~all
- google-site-verification=QNhuJUp-ebQcvO-Y-fLnjs_hO9eXvCjNOHDixgkRczo
- google-site-verification=e-38CjH0Y4fl5s10Kq2Snbcg5SH1QqNKK1nkxoLw_Ac
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