Email domain
au.com email servers, SPF and DMARC
Mail for @au.com goes to mx11.au.com (MX priority 10) and 3 backup hosts, as DNS showed on 5 November 2026. The host sits under au.com. The domain publishes an SPF record ending in ~all and a DMARC policy of p=reject, which decide whether mail claiming to be from @au.com is trusted.
Check one address
Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
Checking a whole list? The first 100 addresses are free, with results to download. No card.
By continuing you agree to our Terms and Privacy Policy.
au.com mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 10 | mx11.au.com | Not identified |
| 10 | mx12.au.com | Not identified |
| 10 | mx13.au.com | Not identified |
| 10 | mx14.au.com | Not identified |
| SPF | v=spf1 include:spf-msg.au.com include:spf-nao.ezweb.ne.jp include:spf-az.ezweb.ne.jp include:spf-ms.ezweb.ne.jp include:saigai.au.com ~all |
|---|---|
| DMARC | v=DMARC1; p=reject; rua=mailto:[email protected], mailto:[email protected] |
| MTA-STS | None published |
| TLS reporting | None published |
Read on 5 November 2026 with dig against 1.1.1.1 (8.8.8.8 as fallback); nothing sent to the mail servers. Check the records today with the email provider lookup.
au.com MX records
au.com publishes 4 MX hosts, all at priority 10, so senders spread mail across them.
au.com SPF record
The record on 5 November 2026 was v=spf1 include:spf-msg.au.com include:spf-nao.ezweb.ne.jp include:spf-az.ezweb.ne.jp include:spf-ms.ezweb.ne.jp include:saigai.au.com ~all.
In plain terms, it delegates to spf-msg.au.com, spf-nao.ezweb.ne.jp, spf-az.ezweb.ne.jp, spf-ms.ezweb.ne.jp and saigai.au.com. The top level uses 5 DNS-querying terms; SPF allows 10 in total including nested includes (RFC 7208 §4.6.4).
It ends in a soft fail (~all): mail from unlisted servers should be accepted but treated as suspicious.
au.com DMARC policy
The record is v=DMARC1; p=reject; rua=mailto:[email protected], mailto:[email protected].
p=reject asks receivers to refuse mail that fails DMARC.
Aggregate reports go to dmarc25.jp and au.com, so the domain's owner sees who sends mail as @au.com.
What that means for you: if a contact gives an @au.com address and you send to them, nothing changes. But never put an @au.com address in the From line of mail sent through your own tool or ESP. It can't pass DMARC for au.com, and this policy tells receivers to refuse it.
Domains on the same mail servers as au.com
1 other domain published exactly the same MX hosts and SPF record as au.com on 5 November 2026: ezweb.ne.jp. Mail to any of them lands on the same servers.
Can you verify @au.com addresses?
Our checker treats @au.com like any domain: syntax, MX, disposable and role checks first, then a made-up address to rule out a catch-all, then your address at RCPT TO, disconnecting without sending. We have not published a test of how mx11.au.com answers for @au.com, so we make no claim here about whether single mailboxes can be confirmed; each result carries its own reason.
Cleaning a list with these addresses
DNS tells you where mail goes, not whether one person's mailbox still exists. For a list, run the whole file through a verifier before you send: invalid rows come out, risky rows (catch-all, unknown, refused) go in their own segment, and valid rows are safe to mail.
Common questions
- What are the MX records for au.com?
- On 5 November 2026:
mx11.au.com(priority 10),mx12.au.com(priority 10),mx13.au.com(priority 10),mx14.au.com(priority 10). - Does au.com have SPF and DMARC?
- On 5 November 2026
au.compublished an SPF record ending in~alland a DMARC policy ofp=reject. - Is au.com a disposable email domain?
- No.
au.comis not on the disposable domain list our checker uses, so @au.com addresses are checked like any other mailbox. See the disposable domain checker for the list. - Is au.com the same mail system as ezweb.ne.jp?
- Its DNS says so: on 5 November 2026 both published the same MX hosts and SPF record, so mail to either lands on the same servers.
Free checks for @au.com lists
- Bulk email checker for a pasted list or CSV
- Verify a whole file with a reason for every row
- SPF lookup counter
- MTA-STS checker
- Disposable email checker
Another domain? See every email domain we have mapped and what our checker does at each mailbox provider.
Got a list with @au.com addresses?
Sign in with Google and the first 100 addresses are checked free: valid, risky and invalid, with the reason for each row and a file to download. No card. After that, plans start at $9/mo for 2,500 emails a month.
By continuing you agree to our Terms and Privacy Policy.