towbook.com

Valid Email Server

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
towbook.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-14 22:34:08 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • towbook-com.mail.protection.outlook.com

MX Priorities

  • towbook-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 4.151.218.6 (no PTR)

Mail Server IPs

  • 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
  • 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com

SOA Record

Raw SOA olga.ns.cloudflare.com dns.cloudflare.com 2406762489 10000 2400 604800 1800
Primary NS (mname)
olga.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2406762489
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

trey.ns.cloudflare.com
olga.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:168.245.5.16 ip4:149.72.203.7 include:spf.braintreegateway.com include:spf.mail.intercom.io include:spf.mandrillapp.com include:spf.protection.outlook.com include:sendgrid.net include:servers.mcsv.net include:50824482.spf05.hubspotemail.net -all
📊 DNS lookups: 9/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✓ 1 found
google._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

10 records
  • new-relic-domain-verification=837edce6eb724ee8ab069e6cf6205f39
  • SPFv=spf1 a mx ip4:168.245.5.16 ip4:149.72.203.7 include:spf.braintreegateway.com include:spf.mail.intercom.io include:spf.mandrillapp.com include:spf.protection.outlook.com include:sendgrid.net include:servers.mcsv.net include:50824482.spf05.hubspotemail.net -all
  • 1password-site-verification=VEOKEMR2VJERFPDFL6M4O24M64
  • _globalsign-domain-verification=6UyBPyPR8_S2U2HUibNvFG75GjfOZlNsBBJHp6R2Rn
  • anthropic-domain-verification-jnapa9=FPFuT9SVmgRNIa4Ov2qqJ7DCo
  • asv=b076616e34ad4ec0a23dfab3a3e5cd61
  • docker-verification=82015184-f474-49f5-8e0d-52a8fee79eca
  • google-site-verification=6e9j4acoh_SYcl8oPAgeC4yfJ8zvpJa7Kq1tZInWzDQ
  • google-site-verification=Q-ZnWvDhtWGZjeX-iSW-kulV-gSoUjlsyYwS-BU-69s
  • google-site-verification=xN_uhRRVeqPCQDDbO65rp6Ju2YfrSsChFutbG_ERt44
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 · Customize →
See demo & docs
Deep verification
Full email verification for towbook.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits