It indicates that the domain frequently changes its MX (Mail Exchange) records. Such behavior is often associated with spam, phishing, or malicious email infrastructure designed to evade detection and blocking.
Three questions every analyst asks before acting on this signal.
It indicates that the domain frequently changes its MX (Mail Exchange) records. Such behavior is often associated with spam, phishing, or malicious email infrastructure designed to evade detection and blocking.
It refers to excessive and rapid MX record rotation within short time intervals, suggesting the domain is part of a dynamic and evasive email delivery or phishing infrastructure.
Legitimate domains rarely modify their MX records frequently. Threat actors rotate MX servers to distribute load, hide malicious sources, and prolong campaign lifespans.
A realistic shape of the entry the engine appends to the risk_signals array when this signal fires. Evidence keys are subgroup-default; per-signal overrides documented in the API reference.
{
"slug": "too_many_mx_change",
"name": "Mail-Flux Behavior Detected",
"group": "dns_history",
"subgroup": "dns_records_mx_ns",
"direction": "malicious",
"evidence": {
"ns_provider": "cloudflare.com",
"ns_provider_tier": "paid_public",
"ns_stability_days": 412,
"mx_provider": "google.com",
"mx_provider_tier": "paid_mail"
}
}8 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
It indicates that both IP and NS (nameserver) records of a domain are changing frequently, a behavior known as 'Double-F…
It means the domain operates its own mail exchange (MX) servers instead of relying on trusted third-party providers like…
It indicates that the domain operates using its own name server infrastructure rather than a reputable third-party DNS p…
It indicates that the domain relies on free or temporary mail providers. Such behavior is common among malicious or low-…
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