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Is rust-lang.org a valid email domain?

Organisation domainChecked 2026-11-06

rust-lang.org can receive email. It publishes 2 mail servers, run by a mail relay service, and the first choice is mxa.mailgun.org.

It is not a free provider and is not on our disposable list, so addresses here usually belong to a company, school or other organisation.

SPF is published and ends with ~all. DMARC is set to none.

Check an email address at rust-lang.org

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MX records (a mail relay service)

PriorityMail serverResolves to
10mxa.mailgun.org34.149.254.5
10mxb.mailgun.org34.149.254.5

SPF

Record published

v=spf1 include:_spf.google.com include:mailgun.org include:servers.mcsv.net ~all

DMARC

Policy: none

v=DMARC1;p=none;pct=100;rua=mailto:dmarc-rua@rust-lang.org;ruf=mailto:dmarc-rua@rust-lang.org

Disposable?

No, not on our disposable list.

Free provider?

No, not a known free provider.

What this means for your email list

What this means for addresses at this domain

Mail routing for rust-lang.org is healthy, so the domain is not the risk. The risk is the mailbox: outdated contacts, shared inboxes and catch-all servers. A mailbox-level check tells you which addresses are safe to send to.

Sender authentication

rust-lang.org has DMARC in monitoring mode (p=none). It collects reports but does not yet block spoofed mail, so the domain is easier to impersonate.

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Frequently asked questions

Is rust-lang.org a valid email domain?
Yes. rust-lang.org publishes 2 MX records and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
Is rust-lang.org a disposable email domain?
No. rust-lang.org is not on our disposable list. The list is updated regularly, and new throwaway domains appear all the time.
What are the MX records for rust-lang.org?
mxa.mailgun.org (priority 10); mxb.mailgun.org (priority 10).
Does rust-lang.org have SPF and DMARC?
SPF: yes, ending ~all. DMARC: yes, policy none.

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