a1.net - Email Domain Verification & Deliverability Report

Active ISP Email Provider
Organization: A1 Telekom Austria
Mail Server: a1.net
Verified 3 days ago

Real-time verification data for a1.net. View MX records, SPF/DKIM/DMARC authentication, and server deliverability status.

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MX Records for a1.net

PriorityMail ServerIP Address
10 smx01.a1.net 80.75.42.227
SMTP Status: Responding
SMTP Banner:
220-smx01.a1.net ESMTP (1)

a1.net uses a1.net mail servers, which means emails are processed through a1.net infrastructure with their built-in spam filtering and security controls.

Email Authentication for a1.net

SPF Record Pass

v=spf1 include:aspf.a1.net include:cspf.a1.net -all
Authorized Senders:
aspf.a1.net cspf.a1.net

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of a1.net.

DMARC Record Reject

v=DMARC1; p=reject; rua=mailto:dmarc-reports@a1.net

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

DKIM Found

DKIM signatures were detected for a1.net, confirming that this domain cryptographically signs outgoing emails.

Authentication Summary: a1.net 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
a1.net
TLD
.net
Created
1995-11-06
Updated
2025-09-15
Expires
2030-09-11
Domain Age
30 years

Registrar

Name
Ascio Technologies, Inc
IANA ID
140

Registrant Contact

Name
Not Disclosed
Organization
Not Disclosed
Location
Not Disclosed, AUSTRIA

Technical Contact

Name
Not Disclosed
Organization
Not Disclosed
Location
Not Disclosed, Not Disclosed, UNITED STATES

Name Servers

  • dns1.a1.net
  • dns2.a1.net
  • dns3.a1.net

About a1.net

a1.net is an Austrian ISP email domain from A1 Telekom Austria, the country's largest telecommunications provider headquartered in Vienna. A1 provides broadband, mobile, and email services to Austrian consumers and businesses.

a1.net implements SPF and DKIM authentication. A1 Telekom maintains anti-spam infrastructure and complies with Austrian and EU GDPR data protection regulations.

The a1.net mail servers enforce recipient verification and reject invalid addresses. The domain does not operate as catch-all. Rate limiting applies from unfamiliar senders.

For delivery to a1.net, authenticate with SPF and DKIM. Comply with Austrian and EU anti-spam regulations for commercial messages.

How to Verify a1.net Email Addresses

Need to check if an email address at a1.net actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to a1.net'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 a1.net Email
Use BulkEmailChecker's free email verification tool to instantly validate any a1.net 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.

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Have a mailing list full of a1.net 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 a1.net Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates a1.net 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, a1.net is a valid email domain provided by A1 Telekom Austria to its internet subscribers. It is a legitimate ISP-issued email address.
No, a1.net is not a disposable or temporary email provider. It is an ISP-provided email service tied to an internet subscription from A1 Telekom Austria.
a1.net uses mail servers operated by A1 Telekom Austria. Check the MX records section above for specific server details and authentication configuration.
Yes, you can send marketing emails to a1.net addresses with proper opt-in consent. ISP email providers apply spam filtering, and addresses may become inactive if subscribers cancel their internet service. Regular list verification is recommended.
Use BulkEmailChecker to verify a1.net addresses via SMTP checks. ISP domains may have specific rate limiting or greylisting behaviors. Our tool handles these provider-specific configurations automatically.
The fastest and most accurate way to verify a a1.net 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 a1.net'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 a1.net 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 a1.net 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 a1.net 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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