Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tenaska.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 05:40:48 UTC · ↺ Refresh
MX Hostnames
- tenaska-com.mail.protection.outlook.com
MX Priorities
- tenaska-com.mail.protection.outlook.com: 5
A / AAAA Records
- 35.199.191.174 ↩ 174.191.199.35.bc.googleusercontent.com
Mail Server IPs
- 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
SOA Record
Raw SOA
dbru.br.ns.els-gms.att.net rm-hostmaster.ems.att.com 261 86400 10000 604800 86400
Primary NS (mname)
dbru.br.ns.els-gms.att.net
Admin Email (rname)
rm-hostmaster@ems.att.com
Serial
261
Refresh
86400s
Retry
10000s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dmtu.mt.ns.els-gms.att.net
dbru.br.ns.els-gms.att.net
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_u.tenaska.com._spf.smart.ondmarc.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r; fo=1; rf=afrf; ri=3600
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
21 records- _54moufl0pxbu37m4znbg6rnizlp6czb
- nrrjb2ursck52afdaguclpf0fi
- atlassian-sending-domain-verification=e7cdaf96-8932-48be-9615-4204a9c5942e
- la660UpiypCjvD2fpjZ0JdgDojxfOPgS8APGe4MGGXxW5rSv4it3JQAhiuM9POoOin+AeuMnZwHLdkBh04HWOg==
- k5rk64elsps2ij2732pig2igh6
- SPFv=spf1 include:_u.tenaska.com._spf.smart.ondmarc.com ~all
- _6r5a2yjf6n3y0gyw38dlwjl8acn4tx2
- ciscocidomainverification=5f02dec158dafa8e01eb1ac97c6150a8728f0d7e876797a2534a3bb196f00ee4
- atlassian-domain-verification=uVzaWQtLEwbDQvP5J8uBaqyczTr5QbEsFSHEecsB9ZpVBRSIwohcpun6ZtJIujhc
- uaqqgkv78th9jclaqdhc0c7alh
- mn3n07p95n1aldvah6q2o801gk
- d365mktkey=527k1rh77c3jcakj7a7cwyxb4
- d365mktkey=6ud10p5i492oj7gmkwqto7ao5
- canva-site-verification=T9comQ6Z2CshLQg81H-WYA
- d365mktkey=6h3x7ohpwiu8m4c6m1r7nzjkz
- jsfe4c2s3hm4jknb8tdbb3ocng
- mgm3dnotquune90nfbtkan2m4l
- 8h29eh8l9860un444l4k6rl4ps
- MS=ms12475827
- g779j4ij9d87v665nckmd0r13o
- intersight=600e69fdb3404946337ca504a0ad54107748c7e803f2b5c38e5bc4cdadb82c60
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 tenaska.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits