Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sirem.com.mx
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 12:42:35 UTC · ↺ Refresh
MX Hostnames
- allmx.xpress.com.mx
- allfb.xpress.com.mx
MX Priorities
- allfb.xpress.com.mx: 20
- allmx.xpress.com.mx: 10
A / AAAA Records
- 195.250.27.46 ↩ s3450.mex1.stableserver.net
Mail Server IPs
No IPs resolved.
SOA Record
Raw SOA
dns1.xpress.com.mx servers.mysecurecloudhost.com 2024091304 3600 1800 1209600 86400
Primary NS (mname)
dns1.xpress.com.mx
Admin Email (rname)
servers@mysecurecloudhost.com
Serial
2024091304
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
dns1.xpress.com.mx
dns2.xpress.com.mx
SPF Record
✓ Strict (-all)
v=spf1 a mx a:allmx.xpress.com.mx a:kmxo.suantispam.com include:spf.antispamcloud.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx a:allmx.xpress.com.mx a:kmxo.suantispam.com include:spf.antispamcloud.com -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 sirem.com.mx
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits