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Domain reputation checker

Check your overall sending domain reputation across authentication, blocklists, domain age, and DNS infrastructure. Get an instant score from 0 to 100 with an A+ to F grade and actionable fixes.

Try Presets:

The 4 pillars of sender reputation.

Mailbox algorithms evaluate authentication, domain age, blocklist presence, and DNS health together.

Authentication (35%)

SPF alignment, active DKIM key discovery, and DMARC enforcement policy (reject or quarantine).

Real-time Blocklists (30%)

Independent live DNSBL lookups across Spamhaus DBL, URIBL Multi, SURBL, SEM URIBL, SEM Fresh, and NordSpam.

Domain Age & Warmup (20%)

Direct RDAP registration age audit. Young (<90 days) and brand-new domains face strict mailbox filter throttling.

DNS & Infrastructure (15%)

Verifies MX exchange reachability, IPv4/IPv6 host resolution, redundant nameservers, and TLS/SSL certificate status.

Check domain reputation programmatically.

Call the same reputation lookup from Node, Python, Go, and the other SDKs — or POST a domain to our public REST endpoint.

1

Install the Node.js package

npm install reloop-email
2

Query domain reputation score with Node.js

check_reputation.ts
1import Reloop from 'reloop-email';
2

3const reloop = new Reloop(process.env.RELOOP_API_KEY);
4

5const report = await reloop.tools.domainReputation({
6  domain: 'reloop.sh',
7});
8

9console.log(`Reputation Score: ${report.score}/100 (${report.grade})`);
10console.log(`Verdict: ${report.verdict} - ${report.verdictLabel}`);
11console.log(`Auth Score: ${report.breakdown.authentication.score}%`);
12console.log(`Blocklists Clean: ${report.details.blocklist.cleanCount}/${report.details.blocklist.totalChecked}`);
3

Inspect JSON reputation report (200 OK)

response.json
1{
2  "domain": "reloop.sh",
3  "resolvedAt": "2026-09-13T03:45:00.000Z",
4  "responseTimeMs": 342,
5  "score": 95,
6  "grade": "A+",
7  "verdict": "excellent",
8  "verdictLabel": "Outstanding reputation. Maximum deliverability confidence.",
9  "breakdown": {
10    "authentication": {
11      "score": 100,
12      "weight": 35,
13      "status": "pass",
14      "summary": "SPF pass, DKIM pass, DMARC pass"
15    },
16    "blocklist": {
17      "score": 100,
18      "weight": 30,
19      "status": "pass",
20      "summary": "6/6 domain blocklists clean"
21    },
22    "domainAge": {
23      "score": 80,
24      "weight": 20,
25      "status": "pass",
26      "summary": "240 days old (established)"
27    },
28    "dnsHealth": {
29      "score": 100,
30      "weight": 15,
31      "status": "pass",
32      "summary": "2 MX, 2 NS, SSL active"
33    }
34  },
35  "checks": [
36    {
37      "id": "auth_spf",
38      "category": "authentication",
39      "label": "SPF Record",
40      "status": "pass",
41      "detail": "SPF record configured with softfail (~all). Strong, standard deliverability.",
42      "record": "v=spf1 include:_spf.reloop.sh ~all"
43    },
44    {
45      "id": "auth_dmarc",
46      "category": "authentication",
47      "label": "DMARC Policy",
48      "status": "pass",
49      "detail": "DMARC policy is set to full reject (p=reject, pct=100). Maximum protection & sender credibility.",
50      "record": "v=DMARC1; p=reject; pct=100; rua=mailto:dmarc@reloop.sh"
51    },
52    {
53      "id": "blocklist_domain",
54      "category": "blocklist",
55      "label": "Domain Blocklists (RBL/URI)",
56      "status": "pass",
57      "detail": "Clean across all 6 major domain blocklists (Spamhaus DBL, URIBL, SURBL, SEM, NordSpam)."
58    }
59  ],
60  "recommendations": [
61    "All domain reputation checks passed. Maintain high sender reputation by monitoring engagement and spam complaint rates below 0.1%."
62  ]
63}

Frequently asked questions.

Learn how domain reputation impacts deliverability, how scoring works, and how to recover from blocklists.

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