Mailgun receives mail for 39 of 9,971 popular domains we measured in November 2026. Below: the records it needs and how its customers actually set them.
| Host | Priority |
|---|---|
mxa.mailgun.org | 10 |
mxb.mailgun.org | 10 |
Domains on Mailgun's EU region use mxa.eu.mailgun.org and mxb.eu.mailgun.org.
Add include:mailgun.org to the domain's single SPF record, for example:
v=spf1 include:mailgun.org -all26 of 39 Mailgun customers in our sample (66.7%) have this include in their SPF record.
TXT record at <selector>._domainkey.<domain>; the selector and key are shown in the Mailgun dashboard for the domain.
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.mailgun.com/
39 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 Mailgun.
Check one yourself:
Customer-specific parts replaced by <domain> and digits by <n>.
| MX host pattern | Domains |
|---|---|
mxa.mailgun.org | 37 |
mxb.mailgun.org | 36 |
mxb.eu.mailgun.org | 2 |
mxa.eu.mailgun.org | 2 |
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.