Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colsongroup.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 21:32:01 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
carol.ns.cloudflare.com dns.cloudflare.com 2399456003 10000 2400 604800 1800
Primary NS (mname)
carol.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399456003
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
jay.ns.cloudflare.com
carol.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:12.188.137.161 ip4:165.227.213.233 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.salesforce.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
10 records- 3381712
- MS=ms57931402
- Tx1Uj/sNurrPzLiE1Q3SjARY4lMLGrkhK1CO94F2nvh82QO3q/CUFnd/JFzTa56Xz/2sC8ZkTUdCCz1soXkLqw==
- apple-domain-verification=t7o2pwA99EFsJfxi
- dpbfad59k219npumclhbkdb1ap
- google-gws-recovery-domain-verification=68937617
- google-site-verification=Y-fTPmtDYja2gaRgTVCcEWV48Q7YPfWrZGFdP1aeuUk
- sending_domain476872=5c4a64ad98a852580d4ac122c2ae7fda75b7a777babb2eb5cf1aa0051496ffa7
- SPFv=spf1 mx ip4:12.188.137.161 ip4:165.227.213.233 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.salesforce.com ~all
- 1k9d928cgcrc17q3s1vquo0bmf
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