Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
alcos.dev
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 19:12:04 UTC · ↺ Refresh
MX Hostnames
- mail.alcos.dev
MX Priorities
- mail.alcos.dev: 0
A / AAAA Records
- 85.209.92.158 ↩ 85-209-92-158.mail.alcos.dev
Mail Server IPs
- 85.209.92.158 ↩ 85-209-92-158.mail.alcos.dev
SOA Record
Raw SOA
dns1.registrar-servers.com hostmaster.registrar-servers.com 1765129163 43200 3600 604800 3601
Primary NS (mname)
dns1.registrar-servers.com
Admin Email (rname)
hostmaster@registrar-servers.com
Serial
1765129163
Refresh
43200s
Retry
3600s
Expire
604800s
Minimum TTL
3601s
Nameservers (NS)
dns2.registrar-servers.com
dns1.registrar-servers.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; adkim=s; aspf=s; sp=reject
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 +a +mx -all
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 alcos.dev
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits