Email domain
rr.com email servers, SPF and DMARC
Mail for @rr.com goes to cdptpa-postmx01.email.rr.com (MX priority 5) and 1 backup host, as DNS showed on 5 November 2026. The host sits under rr.com. The domain publishes an SPF record ending in ~all and no DMARC record, which decide whether mail claiming to be from @rr.com is trusted.
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rr.com mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 5 | cdptpa-postmx01.email.rr.com | Not identified |
| 5 | dnvrco-postmx01.email.rr.com | Not identified |
| SPF | v=spf1 ip4:24.30.203.0/24 ip4:24.28.200.0/24 ip4:24.28.204.0/24 ip4:24.30.218.0/24 ip4:75.180.132.0/24 ip4:71.74.56.0/24 ip4:107.14.166.0/24 ip4:107.14.73.0/24 +mx ~all |
|---|---|
| DMARC | None published |
| 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.
rr.com MX records
rr.com publishes 2 MX hosts, all at priority 5, so senders spread mail across them.
rr.com SPF record
The record on 5 November 2026 was v=spf1 ip4:24.30.203.0/24 ip4:24.28.200.0/24 ip4:24.28.204.0/24 ip4:24.30.218.0/24 ip4:75.180.132.0/24 ip4:71.74.56.0/24 ip4:107.14.166.0/24 ip4:107.14.73.0/24 +mx ~all.
In plain terms, lists 8 IP ranges directly. The top level uses 1 DNS-querying term; 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.
rr.com DMARC policy
_dmarc.rr.com returned no DMARC record on 5 November 2026. Receivers therefore get no instruction about mail that fails SPF and DKIM, which makes @rr.com easier to spoof (RFC 7489).
Can you verify @rr.com addresses?
Our checker treats @rr.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 cdptpa-postmx01.email.rr.com answers for @rr.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 rr.com?
- On 5 November 2026:
cdptpa-postmx01.email.rr.com(priority 5),dnvrco-postmx01.email.rr.com(priority 5). - Does rr.com have SPF and DMARC?
- On 5 November 2026
rr.compublished an SPF record ending in~alland no DMARC record. - Is rr.com a disposable email domain?
- No.
rr.comis not on the disposable domain list our checker uses, so @rr.com addresses are checked like any other mailbox. See the disposable domain checker for the list.
Free checks for @rr.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 @rr.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.