online.nl - Email Domain Verification & Deliverability Report

Active ISP Email Provider
Organization: Online.nl
Mail Server: capitar.com
Verified 3 days ago

Real-time verification data for online.nl. View MX records, SPF/DKIM/DMARC authentication, and server deliverability status.

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MX Records for online.nl

PriorityMail ServerIP Address
100 mx.capitar.com 188.40.16.121
110 smtp-in.online.nl 188.40.16.121
SMTP Status: Responding
SMTP Banner:
220-cap-mail-mx-p03.zt.capitar.com ESMTP Postfix

online.nl uses capitar.com mail servers, which means emails are processed through capitar.com infrastructure with their built-in spam filtering and security controls.

Email Authentication for online.nl

SPF Record Pass

v=spf1 include:node.capitar.com include:sendgrid.net include:trust.outgrow.co include:_spf.atlassian.net mx a ip4:213.244.171.0/25 ip4:85.119.140.200 ip4:83.118.224.82 ip4:83.118.224.83 ip4:83.118.226.162 ip4:83.118.226.140/32 -all
Authorized Senders:
node.capitar.com sendgrid.net trust.outgrow.co _spf.atlassian.net

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of online.nl.

DMARC Record Quarantine

v=DMARC1;p=quarantine;sp=quarantine;pct=100;adkim=r;aspf=r;rua=mailto:dmarc@m7group.eu;ruf=mailto:dmarc@m7group.eu;fo=0:1

Policy applied to: 100% of emails

DMARC (Domain-based Message Authentication) tells receiving servers what to do with emails that fail authentication checks.

DKIM Found

DKIM signatures were detected for online.nl, confirming that this domain cryptographically signs outgoing emails.

Authentication Summary: online.nl has full email authentication configured with SPF, DMARC, and DKIM. This provides strong protection against email spoofing and phishing. Emails sent from this domain are well-authenticated and likely to have high deliverability.

WHOIS & Domain Information

Registration Details

Domain
online.nl
TLD
.nl
Created
1995-11-22
Updated
2019-12-09
Domain Age
30 years

Registrar

Name
Capitar IT Group B.V.
IANA ID
862

Name Servers

  • ns.euronet.com
  • ns.as5390.net

About online.nl

online.nl is an email domain associated with Dutch internet services. The online.nl domain provides email accounts to internet users in the Netherlands as part of the Dutch telecommunications ecosystem.

online.nl supports SPF records for sender authentication. DKIM and DMARC configurations follow standard Dutch ISP practices. Proper authentication alignment is recommended for delivery to online.nl mailboxes.

The online.nl mail servers validate recipients during SMTP sessions and apply reputation-based filtering and content analysis before accepting messages.

For delivery to online.nl, authenticate with SPF and DKIM, maintain clean lists, and comply with Dutch telecommunications law and GDPR for commercial email.

How to Verify online.nl Email Addresses

Need to check if an email address at online.nl actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to online.nl's mail servers to confirm the mailbox is real, active, and able to receive your message. No test email is ever sent, so your sender reputation stays protected.

Verify a Single online.nl Email
Use BulkEmailChecker's free email verification tool to instantly validate any online.nl address. You'll get a complete deliverability report including mailbox existence, catch-all detection, disposable domain flagging, and risk scoring, all in under 3 seconds.

Verify a List of online.nl Emails in Bulk
Have a mailing list full of online.nl addresses? Upload your CSV or TXT file to BulkEmailChecker and verify thousands of email addresses in minutes. Our bulk verification engine runs 30+ checks per address including syntax validation, DNS resolution, SMTP handshake, and spam trap detection. Clean your list before every campaign to keep bounce rates below 2% and protect your sender score. See bulk pricing.

Verify online.nl Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates online.nl email addresses at the point of entry, blocking invalid, disposable, and risky addresses before they enter your database. Integrate with a single API call and prevent bad data at the source.

Frequently Asked Questions

Yes, online.nl is a valid email domain providing email services to internet users in the Netherlands within Dutch telecommunications infrastructure.
No, online.nl is not a disposable or temporary email service. It is a permanent ISP email domain serving Dutch internet subscribers.
online.nl uses mail servers within Dutch telecommunications infrastructure. The MX records direct inbound email to gateways handling filtering and delivery for online.nl mailboxes.
You can send marketing emails to online.nl addresses with valid opt-in consent. Authenticate with SPF and DKIM, comply with Dutch telecom law and GDPR, and honor unsubscribe requests.
You can verify an online.nl email address using an email verification tool that checks MX records and performs SMTP-level validation to confirm the mailbox is active.
The fastest and most accurate way to verify a online.nl email address is to use BulkEmailChecker's free email verification tool. Simply enter the full email address and our system performs SMTP-level validation by connecting directly to online.nl's mail servers. You'll get instant results showing whether the mailbox exists, is deliverable, and is safe to send to, all without sending a single email.
Yes. BulkEmailChecker uses SMTP verification to check if a online.nl mailbox exists without ever delivering an email. Our system connects to the domain's mail server, performs an SMTP handshake, and queries the mail server to confirm whether the recipient address is valid. This process is completely invisible to the email recipient and does not affect your sender reputation.
Sending to invalid email addresses causes hard bounces, which directly damage your sender reputation. Internet Service Providers (ISPs) and email providers track your bounce rate, and if it exceeds 2%, your emails may start landing in spam folders or get blocked entirely. Verifying online.nl addresses with BulkEmailChecker before sending prevents bounces and keeps your deliverability high.
BulkEmailChecker's bulk verification service lets you upload a CSV or TXT file containing thousands of online.nl email addresses and verify them all at once. Each address goes through 30+ verification checks including syntax validation, DNS/MX lookup, SMTP verification, disposable domain detection, and spam trap identification. Results are typically ready within minutes and can be downloaded as a clean, verified list.
Email verification is the process of confirming that an email address is real, properly formatted, and capable of receiving messages. It matters because sending to invalid addresses causes bounces, damages your sender reputation, wastes marketing budget, and can get your sending IP blacklisted. BulkEmailChecker verifies addresses at the SMTP level, the most accurate method available, ensuring your emails reach real people.
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. When you send an email, your mail server looks up the recipient domain's MX records to find where to deliver the message. If a domain has no MX records, it cannot receive email. BulkEmailChecker checks MX records as part of every verification to confirm the domain is configured for email delivery.
A catch-all (or accept-all) domain is configured to accept email sent to any address at that domain, regardless of whether the specific mailbox exists. This makes it harder to verify individual addresses because the server always responds positively. BulkEmailChecker detects catch-all configurations and flags them in verification results so you can make informed decisions about sending to those addresses.
Yes. BulkEmailChecker offers a real-time email verification API that you can integrate into signup forms, CRM systems, lead capture tools, and any application that collects email addresses. The API validates addresses at the point of entry, blocking invalid, disposable, and risky emails before they enter your database. Integration takes just a single API call with response times under 3 seconds.

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