Email domain
etb.net.co email servers, SPF and DMARC
Mail for @etb.net.co goes to mx1.etb.net.co (MX priority 1) and 3 backup hosts, as DNS showed on 5 November 2026. The host sits under etb.net.co. The domain publishes an SPF record ending in ~all and a DMARC policy of p=none, which decide whether mail claiming to be from @etb.net.co is trusted.
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etb.net.co mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 1 | mx1.etb.net.co | Not identified |
| 1 | mx2.etb.net.co | Not identified |
| 10 | mx1.admincollaborationservices.etb.net.co | Not identified |
| 10 | mx2.admincollaborationservices.etb.net.co | Not identified |
| SPF | v=spf1 mx ip4:200.69.107.0/24 ip4:190.27.245.0/24 ip4:190.24.81.200 ip4:190.24.81.138 ip4:186.29.143.1 ip4:186.29.143.2 ip4:186.29.143.100 a:smtp-atlas.etb.net.co a:smtp-cronos.etb.net.co a:smtp-bocuavas01.etb.net.co a:smtp-bocuavas02.etb.net.co ip4:190.26.181.4 ip4:186.29.143.3 ip4:186.29.143.4 ~all |
|---|---|
| DMARC | v=DMARC1; p=none; sp=none; pct=100; adkim=r; aspf=r; rua=mailto:[email protected]; ruf=mailto:[email protected]; ri=14400; fo=1 |
| 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.
etb.net.co MX records
etb.net.co publishes 4 MX hosts; senders try the lowest priority number first (mx1.etb.net.co, 1) and fall back to the others in order.
etb.net.co SPF record
The record on 5 November 2026 was v=spf1 mx ip4:200.69.107.0/24 ip4:190.27.245.0/24 ip4:190.24.81.200 ip4:190.24.81.138 ip4:186.29.143.1 ip4:186.29.143.2 ip4:186.29.143.100 a:smtp-atlas.etb.net.co a:smtp-cronos.etb.net.co a:smtp-bocuavas01.etb.net.co a:smtp-bocuavas02.etb.net.co ip4:190.26.181.4 ip4:186.29.143.3 ip4:186.29.143.4 ~all.
In plain terms, lists 10 IP ranges directly. 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.
etb.net.co DMARC policy
The record is v=DMARC1; p=none; sp=none; pct=100; adkim=r; aspf=r; rua=mailto:[email protected]; ruf=mailto:[email protected]; ri=14400; fo=1.
p=none only asks for reports; failing mail is delivered as normal.
Aggregate reports go to etb.net.co, so the domain's owner sees who sends mail as @etb.net.co.
Can you verify @etb.net.co addresses?
Our checker treats @etb.net.co 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 mx1.etb.net.co answers for @etb.net.co, 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 etb.net.co?
- On 5 November 2026:
mx1.etb.net.co(priority 1),mx2.etb.net.co(priority 1),mx1.admincollaborationservices.etb.net.co(priority 10),mx2.admincollaborationservices.etb.net.co(priority 10). - Does etb.net.co have SPF and DMARC?
- On 5 November 2026
etb.net.copublished an SPF record ending in~alland a DMARC policy ofp=none. - Is etb.net.co a disposable email domain?
- No.
etb.net.cois not on the disposable domain list our checker uses, so @etb.net.co addresses are checked like any other mailbox. See the disposable domain checker for the list.
Free checks for @etb.net.co 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 @etb.net.co addresses?
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