Broadcom Email Security.cloud (MessageLabs) receives mail for 14 of 9,971 popular domains we measured in November 2026. Below: the records it needs and how its customers actually set them.
MX hosts are assigned per cluster, for example cluster1.eu.messagelabs.com and cluster1a.eu.messagelabs.com.
Add include:spf.messagelabs.com to the domain's single SPF record, for example:
v=spf1 include:spf.messagelabs.com -all7 of 14 Broadcom Email Security.cloud (MessageLabs) customers in our sample (50.0%) have this include in their SPF record.
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.broadcom.com/products/cybersecurity/email
14 customer domains in the sample (accent bars) compared with all 9,971 measured domains (grey bars).
The highest-ranked domains in the sample whose MX records point to Broadcom Email Security.cloud (MessageLabs).
Check one yourself:
Customer-specific parts replaced by <domain> and digits by <n>.
| MX host pattern | Domains |
|---|---|
cluster<n>.us.messagelabs.com | 9 |
cluster<n>a.us.messagelabs.com | 9 |
cluster<n>.eu.messagelabs.com | 5 |
cluster<n>a.eu.messagelabs.com | 5 |
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.