Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sifive.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-28 15:36:18 UTC · ↺ Refresh
MX Hostnames
- aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt4.aspmx.l.google.com
- alt1.aspmx.l.google.com
MX Priorities
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
A / AAAA Records
- 13.33.67.65
- 13.33.67.79
- 13.33.67.85
- 13.33.67.17
Mail Server IPs
- 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
- 142.251.167.27 ↩ ww-in-f27.1e100.net
- 2607:f8b0:4004:c19::1a ↩ bk-in-f26.1e100.net
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.26 ↩ ws-in-f26.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
SOA Record
Raw SOA
ns-521.awsdns-01.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-521.awsdns-01.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1331.awsdns-38.org
ns-194.awsdns-24.com
ns-1969.awsdns-54.co.uk
ns-521.awsdns-01.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:107.20.210.250 ip4:52.1.14.157 ip4:64.62.193.192/26 ip4:96.72.175.168/29 ip4:4.53.31.128/25 ip4:14.143.246.163 include:_spf.google.com include:3020607.spf02.hubspotemail.net include:sendgrid.net include:_spf.salesforce.com include:spf.protection.outlook.com include:_spf.psm.knowbe4.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected], mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected], mailto:[email protected]
DKIM Selectors
✓ 5 found
google._domainkey
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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
11 records- smartsheet-site-validation=Cqgtxe4vT1LOjJICufA3G53ZyZPL6M50
- SPFv=spf1 ip4:107.20.210.250 ip4:52.1.14.157 ip4:64.62.193.192/26 ip4:96.72.175.168/29 ip4:4.53.31.128/25 ip4:14.143.246.163 include:_spf.google.com include:3020607.spf02.hubspotemail.net include:sendgrid.net include:_spf.salesforce.com include:spf.protection.outlook.com include:_spf.psm.knowbe4.com ~all
- MS=9C32C38C3FA2ECFC1C6EEC943FF751E705D94F9E
- MS=ms91963974
- ZOOM_verify_rkLBkTWvR4epPUgdl0Urzg
- apple-domain-verification=gIWjh9RGp43KNUVO
- atlassian-domain-verification=+9RKamieUK8q9emskRImOT0gRZqKzkcQArurNB0A2VROjzgCOFY8bvcuMN4K30Eh
- docusign=f78d5848-74fc-472e-80fb-bb1ad7a8db53
- google-site-verification=0nezCe1j1BK4VHjRVk3IkKbSh_GFBWMS8Le631oQ5wA
- google-site-verification=pi16nn7jr2zAdHq3lOTjh2XpJRUWW8pRv_0qz84beXc
- onetrust-domain-verification=c3b03b71bd4d4f86b85f397c9341aa97
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for sifive.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits