Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rtr.ca
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 17:54:06 UTC · ↺ Refresh
MX Hostnames
- rtr.ca
MX Priorities
- rtr.ca: 10
A / AAAA Records
- 24.156.181.17 ↩ ip-24-156-181-17.user.start.ca
Mail Server IPs
- 24.156.181.17 ↩ ip-24-156-181-17.user.start.ca
SOA Record
Raw SOA
ns1.dynu.com administrator.dynu.com 165 1800 300 86400 300
Primary NS (mname)
ns1.dynu.com
Admin Email (rname)
administrator@dynu.com
Serial
165
Refresh
1800s
Retry
300s
Expire
86400s
Minimum TTL
300s
Nameservers (NS)
ns2.dynu.com
ns1.dynu.com
ns5.dynu.com
ns3.dynu.com
ns4.dynu.com
ns6.dynu.com
SPF Record
✓ Soft Fail (~all)
v=spf1 mx mx:start.ca mx:relay.rtr.ca include:dynu.com include:wiredblade.com ip6:2600:1611:1::e:3/124 all
📊 DNS lookups: 5/10
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
2 records- SPFv=spf1 mx mx:start.ca mx:relay.rtr.ca include:dynu.com include:wiredblade.com ip6:2600:1611:1::e:3/124 all
- google-site-verification=gKJ4rRg6jLNEj23EDuxv_kKwTbOXrUkLEsgpLKnSl9k
Full email verification for rtr.ca
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits