Barracuda Email Protection receives mail for 22 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 customer under ess.barracudanetworks.com, for example d<id>.a.ess.barracudanetworks.com.
Add include:spf.ess.barracudanetworks.com to the domain's single SPF record, for example:
v=spf1 include:spf.ess.barracudanetworks.com -all5 of 22 Barracuda Email Protection customers in our sample (22.7%) 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.barracuda.com/products/email-protection
22 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 Barracuda Email Protection.
Check one yourself:
Customer-specific parts replaced by <domain> and digits by <n>.
| MX host pattern | Domains |
|---|---|
d<n>a.ess.barracudanetworks.com | 17 |
d<n>b.ess.barracudanetworks.com | 16 |
d<n>.b.ess.de.barracudanetworks.com | 4 |
d<n>.a.ess.de.barracudanetworks.com | 4 |
d<n>.b.ess.uk.barracudanetworks.com | 1 |
d<n>.a.ess.uk.barracudanetworks.com | 1 |
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.