Email domain
rcn.com email servers, SPF and DMARC
Mail for @rcn.com goes to mx.rcn.com (MX priority 50), as DNS showed on 5 November 2026. The host sits under rcn.com. The domain publishes an SPF record ending in ~all and a DMARC policy of p=none, which decide whether mail claiming to be from @rcn.com is trusted.
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rcn.com mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 50 | mx.rcn.com | Not identified |
| SPF | v=spf1 include:_netblocks.eloqua.com ip4:207.172.4.0/24 ip4:207.172.157.0/24 ip4:208.58.56.0/24 ip4:198.183.9.0/24 ip4:146.115.106.224/27 ip4:207.172.159.1 ip4:66.235.59.86 ip4:130.250.132.170 ip4:130.250.130.230 a:mail.mutare.com a:mail.mutaresoftware.com include:_spf.rcn.syn-alias.com ~all |
|---|---|
| DMARC | v=DMARC1;p=none;sp=none;pct=100;rua=mailto:[email protected];ruf=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.
rcn.com MX records
rcn.com publishes a single MX host, mx.rcn.com. With no backup host, a sender that can't reach it queues the message and retries until the server answers or the queue gives up.
rcn.com SPF record
The record on 5 November 2026 was v=spf1 include:_netblocks.eloqua.com ip4:207.172.4.0/24 ip4:207.172.157.0/24 ip4:208.58.56.0/24 ip4:198.183.9.0/24 ip4:146.115.106.224/27 ip4:207.172.159.1 ip4:66.235.59.86 ip4:130.250.132.170 ip4:130.250.130.230 a:mail.mutare.com a:mail.mutaresoftware.com include:_spf.rcn.syn-alias.com ~all.
In plain terms, it delegates to _netblocks.eloqua.com and _spf.rcn.syn-alias.com and lists 9 IP ranges directly. The top level uses 4 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.
rcn.com DMARC policy
The record is v=DMARC1;p=none;sp=none;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected].
p=none only asks for reports; failing mail is delivered as normal.
Aggregate reports go to eng.rcn.net, so the domain's owner sees who sends mail as @rcn.com.
Can you verify @rcn.com addresses?
Our checker treats @rcn.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 mx.rcn.com answers for @rcn.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 rcn.com?
- On 5 November 2026:
mx.rcn.com(priority 50). - Does rcn.com have SPF and DMARC?
- On 5 November 2026
rcn.compublished an SPF record ending in~alland a DMARC policy ofp=none. - Is rcn.com a disposable email domain?
- No.
rcn.comis not on the disposable domain list our checker uses, so @rcn.com addresses are checked like any other mailbox. See the disposable domain checker for the list.
Free checks for @rcn.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 @rcn.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.
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