linetec.at - DNS, WHOIS, DMARC and SPF of the domain name

Summary

Registrar: DREAM BIGGER VENTURES GMBH ( https://nic.at/registrar/731 )
Status
Created on: January 14, 2017
Expires on: —
Name servers: the-domains.website, visit.the-domains.website, domain-for-sale.at
Mail servers: —
SPF: Strict
DKIM: No key found among the common selectors
Website: See the website

Authorized senders (SPF)

Strict

E-mails sent by any other server are rejected.

SPF lists the servers allowed to send e-mails for linetec.at.

Rule	Value	Result
all	—	Rejected

Top-level DNS lookups: 0 of 10 allowed

Record

v=spf1 -all

MX, SPF, DKIM and DMARC: the e-mail records

Four DNS records make a domain's e-mail work. MX says where e-mails sent to linetec.at arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from linetec.at was really sent by this domain, which protects it against spoofing.

MX

An MX (Mail Exchanger) record designates a server that receives e-mails sent to the domain. When someone writes to an @linetec.at address, their mail server queries the DNS for the domain's MX records, then delivers the message to the server they point to.

Example record

linetec.at  MX  10 mx1.linetec.at.
linetec.at  MX  20 mx2.linetec.at.

What the record contains

10, 20: Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
mx1.linetec.at.: Host name of the mail server. It must point to an A or AAAA record: an IP address or an alias (CNAME) is not allowed here.
0 .: An MX "0 .", called a null MX, declares that the domain accepts no e-mail: sending servers give up at once instead of retrying.

Declaring at least two servers with different priorities avoids losing e-mails during an outage: sending servers retry for several days and fall back on the backup server. Without any MX, they try to deliver directly to the IP address of the domain.

SPF

SPF (Sender Policy Framework) is a TXT record listing the servers allowed to send e-mails on behalf of the domain. The receiving server checks that the sender is on this list. The final "all" rule says what to do with other servers: reject them (-all), flag their e-mails as suspicious (~all) or make no decision (?all).

Example record

linetec.at  TXT  "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"

What the record contains

v=spf1: Identifies the record as an SPF policy. It must come first.
ip4, ip6: Allows a specific IP address or an address range, for example ip4:192.0.2.0/24.
a, mx: Allows the addresses of the domain itself (A record) or those of its mail servers (MX).
include: Allows the servers of another domain, usually a sending service: include:_spf.google.com for Google Workspace.
-all, ~all: Final rule, applied to every other server. Its qualifier decides what happens to them: - rejects them, ~ flags their e-mails as suspicious, ? makes no decision, + accepts them (avoid it).

A domain must publish only one SPF record, and its evaluation cannot exceed 10 DNS lookups (include, a, mx, exists, redirect). Beyond that, mail servers treat it as invalid.

DKIM

DKIM (DomainKeys Identified Mail) signs every outgoing e-mail with a private key. The matching public key is published in a TXT record at selector._domainkey.linetec.at, so the recipient can check that the message really comes from the domain and was not altered on the way. The selector is chosen by each sending service and cannot be guessed: Dataweaz checks the most common ones (Google Workspace, Microsoft 365, Mailchimp, SendGrid…), so a key published under another selector may exist without appearing here.

Example record

google._domainkey.linetec.at  TXT  "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"

What the record contains

v=DKIM1: Protocol version. Optional but recommended, in which case it must come first.
k: Key algorithm: rsa, the most common, or ed25519.
p: Public key, base64-encoded. An empty value means the key has been revoked.
t: Flags: y marks a key in testing, whose failures must not be penalized; s forbids its use for subdomains.

Each sending service publishes its key under its own selector (google, selector1, k1…), which allows several keys and seamless rotation. A 2048-bit RSA key is recommended today.

DMARC

DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. Published on _dmarc.linetec.at, it tells mail servers what to do with an e-mail that fails these checks (let it through, send it to spam or reject it) and where to send reports.

Example record

_dmarc.linetec.at  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"

What the record contains

v=DMARC1: Identifies the record as a DMARC policy. It must come first.
p: Policy applied to e-mails that fail the checks: none (monitoring only), quarantine (spam folder) or reject.
sp: Subdomain policy. Without it, subdomains follow the domain's policy.
rua: Address that receives daily aggregate reports about e-mails sent on behalf of the domain, whether they pass the checks or not.
ruf: Address that receives detailed failure reports, message by message. Few providers still send them.
pct: Percentage of e-mails subject to the policy, for a gradual rollout. 100 by default.
adkim, aspf: DKIM and SPF alignment: r (relaxed, a subdomain of the same domain is enough) or s (strict, the domain must be identical).

To roll out DMARC without blocking legitimate e-mails, start with p=none and an rua address, analyze the reports to find every service sending on behalf of the domain, then move to quarantine and finally to reject.

DNS records of linetec.at

IP addresses (A and AAAA)

An A record maps the domain name to an IPv4 address: the address of the server that browsers contact to display the website. The AAAA record does the same for an IPv6 address. A domain can have several of them to spread visits across several servers.

Type	IP address
A	75.2.126.67

Name servers (NS)

NS records designate the authoritative DNS servers of the domain: they answer every question about its other records (A, MX, TXT…). They are provided by the registrar, the hosting provider or a dedicated DNS service, and several servers are declared so that the domain keeps working if one of them fails.

Server	IP address
the-domains.website	142.93.233.228
visit.the-domains.website	77.68.16.186
domain-for-sale.at	18.193.37.16

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @linetec.at addresses. Each server has a priority: the one with the lowest number is tried first, the others take over if it fails. Without an MX record, the domain cannot receive e-mails.

No mail server: the domain does not receive e-mails.

TXT records

TXT records hold free text. They are used to prove ownership of the domain to online services (Google, Microsoft, Facebook…) and to publish e-mail security rules: SPF on the domain itself, DMARC on _dmarc.linetec.at.

Name	Content
linetec.at	2a6c68c32c4734b7ea8537a9cbc1437ec92a1ed6
linetec.at	3b7c27e9f0a9a65475762775aabe83f7e0c01ed6
linetec.at	v=spf1 -all

Related IP addresses

IPv4 addresses used by linetec.at: website, name servers, mail servers and senders authorized by SPF.

IP address	Used for	/24 block
75.2.126.67	Website	75.2.126.0/24
142.93.233.228	Name server the-domains.website	142.93.233.0/24
77.68.16.186	Name server visit.the-domains.website	77.68.16.0/24
18.193.37.16	Name server domain-for-sale.at	18.193.37.0/24

WHOIS of the domain linetec.at

% Copyright (c)2026 by NIC.AT (1)                                       
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% target advertising  or similar activities is explicitly  forbidden and
% can be prosecuted.
%
% It is furthermore strictly forbidden to use the Whois-Database in such
% a  way  that  jeopardizes or  could jeopardize  the  stability  of the
% technical  systems of  NIC.AT  under any circumstances. In particular,
% this includes  any misuse  of the  Whois-Database and  any  use of the
% Whois-Database which disturbs its operation.
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% Should the  user violate  these points,  NIC.AT reserves  the right to
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domain:            linetec.at
registrar:         DREAM BIGGER VENTURES GMBH ( https://nic.at/registrar/731 )
registrant:        CO14415323-NICAT
tech-c:            CO14415323-NICAT
nserver:           domain-for-sale.at
nserver:           the-domains.website
nserver:           visit.the-domains.website
changed:           20260715 22:12:19
registered:        20170114 07:30:29
source:            AT-DOM

personname:        
organization:      CORNUCOPIAS.COM OU
street address:    Tiigi
street address:    Anija kula
street address:    Anija vald
postal code:       74411
state or province: 
city:              Anija
country:           Estonia
phone:             +372.58876889
e-mail:            [email protected]
nic-hdl:           CO14415323-NICAT
changed:           20250731 17:58:47
source:            AT-DOM

% Query time: 344 msec
% WHEN: Fri Oct 02 00:05:13 UTC 2026