Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
linear.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 05:12:50 UTC · ↺ Refresh
MX Hostnames
- mxa-00128a01.gslb.pphosted.com
- mxb-00128a01.gslb.pphosted.com
MX Priorities
- mxa-00128a01.gslb.pphosted.com: 100
- mxb-00128a01.gslb.pphosted.com: 1
A / AAAA Records
- 137.71.173.133 (no PTR)
Mail Server IPs
- 148.163.139.77 ↩ mx0b-00128a01.pphosted.com
- 148.163.135.77 ↩ mx0a-00128a01.pphosted.com
SOA Record
Raw SOA
dns1.cscdns.net hostmaster.cscdns.net 2025082005 28800 7200 604800 86400
Primary NS (mname)
dns1.cscdns.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2025082005
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns2.cscdns.net
dns1.cscdns.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:67.216.78.8 ip4:64.57.218.70 ip4:64.106.227.8 ip4:52.36.127.245 ip4:64.89.44.0/23 ip4:167.216.128.0/22 ip4:207.211.31.0/25 ip4:54.235.159.97 include:servers.mcsv.net include:spf-00123c01.pphosted.com include:_spf.google.com ip4:12.218.215.72 ip4:38.111.151.72 ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=25; 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 25% of failing messages only
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
5 records- MS=ms49467395
- _i4gw2cisqbm8xoweee9oyuaemk6t0sw
- google-site-verification=AF7grH4869wRf9c76NhUuJVa5FzQ2gGAZM0qCxX18w0
- google-site-verification=gGAp8T71HWItH1Og1xC0Eu30PXUEkWslCMlfNRIWqJ4
- SPFv=spf1 ip4:67.216.78.8 ip4:64.57.218.70 ip4:64.106.227.8 ip4:52.36.127.245 ip4:64.89.44.0/23 ip4:167.216.128.0/22 ip4:207.211.31.0/25 ip4:54.235.159.97 include:servers.mcsv.net include:spf-00123c01.pphosted.com include:_spf.google.com ip4:12.218.215.72 ip4:38.111.151.72 ~all
Full email verification for linear.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits