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Trellix Email Security

Trellix Email Security receives mail for 7 of 9,971 popular domains we measured in November 2026. Below: the records it needs and how its customers actually set them.

0.1%of measured domains7 of 9,971
0.1%of domains that receive mail
7use it as primary MX
71.4%customers enforce DMARCp=quarantine or p=reject

Correct setup for Trellix Email Security

DMARC

Publish a TXT record at _dmarc.<domain> once SPF and DKIM pass for all mail you send, start with p=none and a reporting address, then move to p=quarantine or p=reject:

v=DMARC1; p=reject; rua=mailto:dmarc-reports@<domain>

Provider site: https://www.trellix.com/

How Trellix Email Security customers configure email security

7 customer domains in the sample (accent bars) compared with all 9,971 measured domains (grey bars).

SPF record 100.0%
all measured 75.7%
SPF -all (hard fail) 57.1%
all measured 37.7%
DMARC record 100.0%
all measured 68.0%
DMARC enforced 71.4%
all measured 50.9%
DMARC p=reject 57.1%
all measured 31.4%
MTA-STS 14.3%
all measured 3.0%

Well-known domains using Trellix Email Security

The highest-ranked domains in the sample whose MX records point to Trellix Email Security.

skyhigh.cloudtrellix.comuseinsider.comglobalnews.cacomparethemarket.comtohotheater.jptoss.im

Check one yourself:

Check MX recordsValidate SPFLook up TXT records

MX host names seen

Customer-specific parts replaced by <domain> and digits by <n>.

MX host patternDomains
alt<n>.us.email.fireeyecloud.com4
primary.us.email.fireeyecloud.com4
alt<n>.emea.email.fireeyecloud.com2
primary.emea.email.fireeyecloud.com2
alt<n>.ap.email.fireeyecloud.com1
primary.ap.email.fireeyecloud.com1

Source: our own scan of November 2026 (2026-11-11), 9,971 of the top 10,000 domains of the Tranco list Y895G that answered in DNS. Method and data.