Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nationalguard.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 01:57:51 UTC · ↺ Refresh
MX Hostnames
- mx2.emailsrvr.com
- mx1.emailsrvr.com
MX Priorities
- mx2.emailsrvr.com: 20
- mx1.emailsrvr.com: 10
A / AAAA Records
- 16.65.35.37 ↩ ec2-16-65-35-37.us-gov-east-1.compute.amazonaws.com
- 18.254.12.199 ↩ ec2-18-254-12-199.us-gov-east-1.compute.amazonaws.com
Mail Server IPs
- 146.20.161.2 ↩ mx2.emailsrvr.com
- 146.20.161.1 ↩ mx1.emailsrvr.com
- 173.203.187.1 ↩ mx1.emailsrvr.com
- 108.166.43.1 ↩ mx1.emailsrvr.com
- 184.106.54.1 ↩ mx1.emailsrvr.com
SOA Record
Raw SOA
ns-372.awsdns-46.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-372.awsdns-46.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-740.awsdns-28.net
ns-1068.awsdns-05.org
ns-1935.awsdns-49.co.uk
ns-372.awsdns-46.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:spfip.nationalguard.com include:emailsrvr.com include:amazonses.com include:et._spf.pardot.com exists:%{i}._spf.mta.salesforce.com ~all
📊 DNS lookups: 7/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; aspf=s ; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
12 records- google-site-verification=HfBOziqKEJ-igCGBwLRWS9yKKLsPskWRl9TDLC1C510
- google-site-verification=VWp3k0tJx0ju7EWiMxkTN4TtJD_sR7AtGkIJNg3m4CM
- google-site-verification=qi6Mq-5wz3zgmLqpteTx0PFCecRYv4WUv-HqWVIOc14
- lhv93v5xstrbf2dl1k5fdfg29d6g15m8
- mandrill_verify.mwun1HM-FA-Lp8XasL3kDw
- szx0wsx0fbtdd0qx70b5778mdq66nx3w
- SPFv=spf1 a mx include:spfip.nationalguard.com include:emailsrvr.com include:amazonses.com include:et._spf.pardot.com exists:%{i}._spf.mta.salesforce.com ~all
- SPFv=spf1 mx include:service.govdelivery.com -all
- 0y04nd07p1v5ckgmxj3f35r551nsltsf
- YWFIv1UNQx2PBIBCwA2eN6JxMZQliFqrB7ioCqOBjuM
- _ib8uqmbfy6cprpfubz2sqvpka5uyss6
- facebook-domain-verification=e6bg92rhe02gr4bz3ggl7rewyik5pw
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 nationalguard.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits