Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cotesma.com.ar
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-14 03:17:21 UTC · ↺ Refresh
MX Hostnames
- cotesma-com-ar.mail.protection.outlook.com
MX Priorities
- cotesma-com-ar.mail.protection.outlook.com: 0
A / AAAA Records
- 201.220.160.6 ↩ hydra.cotesma.com.ar
Mail Server IPs
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
- 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
- 2a01:111:f403:c901::1 ↩ mail-bl2pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.smandes.com.ar nsmaster.smandes.com.ar 2026030217 21600 3600 604800 86400
Primary NS (mname)
ns1.smandes.com.ar
Admin Email (rname)
nsmaster@smandes.com.ar
Serial
2026030217
Refresh
21600s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns1.smandes.com.ar
ns2.smandes.com.ar
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx ip4:201.220.160.5 ip4:201.220.160.56 ip4:201.220.160.57 ip4:35.190.190.203 include:spf.protection.outlook.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine; pct=5;ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
⚠ Policy applies to 5% of failing messages only
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 a mx ip4:201.220.160.5 ip4:201.220.160.56 ip4:201.220.160.57 ip4:35.190.190.203 include:spf.protection.outlook.com ~all
- MS=ms39687420
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 cotesma.com.ar
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits