Yes. You can verify any @Caiway.nl address in real time with a direct SMTP handshake that provides 99.7% accuracy. Caiway.nl is operated by Caiway, runs 4 mail servers, enforces 3 of 3 authentication standards, and is currently responding to SMTP.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
caiway.nl publishes 4 MX records. The primary mail exchanger is mx1.caiway.net, hosted by caiway.net, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 10 | mx1.caiway.net | 217.102.255.218 | Reachable |
| 20 | mx2.caiway.net | 217.102.255.239 | Reachable |
| 30 | mx3.caiway.net | 217.102.255.238 | Reachable |
| 40 | mx4.caiway.net | 217.102.255.245 | Reachable |
220 spamfilter22.delta.nl ESMTP Exim 20260526.1053 Wed, 03 Jun 2026 21:10:53 +0200Yes. caiway.nl is a valid email domain, operated by Caiway. Addresses are persistent and real mail reaches a genuine recipient. Individual mailboxes still go stale, so verify each one before you send.
A live SMTP handshake connects to Caiway.nl's mail server and asks whether the mailbox exists using the RCPT TO command, without ever transmitting a message. The recipient never sees the check.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
Free inboxes get abandoned constantly. Verification drops the dead caiway.nl mailboxes before you mail them.
Mistyped caiway.nl addresses fail a real SMTP check, so they never turn into a hard bounce.
A clean list keeps your bounce rate low, and a low bounce rate is what protects inbox placement on a big send.
Mailing only live caiway.nl addresses raises every rate that matters: opens, clicks, and replies.
Caiway.nl is Caiway, registered through DELTA Fiber Nederland B.V. and first seen Aug 26, 2003.
caiway.nl is the email domain for Caiway, a Dutch cable and internet service provider. Caiway provides broadband internet, cable TV, and telephone services to customers in the Netherlands, offering email accounts to subscribers through the caiway.nl domain. Caiway is now part of the DELTA Fiber group.
caiway.nl supports SPF records for sender authentication. DKIM and DMARC configurations follow standard Dutch ISP practices. Senders should align SPF and DKIM for reliable delivery to caiway.nl mailboxes.
The caiway.nl mail servers validate recipients at the SMTP level, rejecting invalid addresses. Dutch ISP mail systems apply reputation-based filtering, content analysis, and authentication checks. Messages from unfamiliar senders may face additional scrutiny.
For delivery to caiway.nl, authenticate with SPF and DKIM, maintain clean subscriber lists, and comply with Dutch telecommunications law (Tw) and GDPR requirements for commercial email communications.
Upload a CSV or TXT list of Caiway.nl addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Caiway.nl address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
Yes, caiway.nl is a valid email domain operated by Caiway, a Dutch cable and internet provider now part of the DELTA Fiber group. Email accounts are provided to Caiway broadband subscribers.
No, caiway.nl is not a disposable or temporary email service. It is a permanent ISP email domain provided by Caiway to its internet subscribers in the Netherlands.
caiway.nl uses mail servers managed by Caiway/DELTA Fiber infrastructure in the Netherlands. The MX records direct inbound email to their mail gateways for filtering and delivery to subscriber mailboxes.
You can send marketing emails to caiway.nl addresses with proper opt-in consent. Authenticate with SPF and DKIM, comply with Dutch telecom law and GDPR, and honor unsubscribe requests promptly.
You can verify a caiway.nl email address using an email verification service that checks MX records and performs SMTP-level mailbox validation to confirm the address is active and accepting messages.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with caiway.nl's mail servers, the same engine that has verified billions of addresses since 2012.
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