🔍 DNS-Check: python.org
E-mail deliverability, SPF and DMARC records for python.org.
Format: domain.tld (no https:// or path), e.g. google.com
Why is a DNS and mail deliverability check important for python.org?
The correct configuration of your DNS records (Domain Name System) is essential for the security and reliability of your online presence. For email sending in particular, missing or incorrect records often cause important messages to land in the recipient's spam folder or be blocked entirely.
MX Records (Mail Exchanger)
MX records determine which mail servers are responsible for receiving emails for the domain python.org. If these are set incorrectly, no emails can be received.
SPF (Sender Policy Framework)
An SPF record is a TXT record in the DNS settings of python.org. It defines which IP addresses and servers are authorized to send emails on behalf of your domain to prevent abuse and phishing.
DMARC
DMARC builds upon SPF and DKIM. It tells receiving servers how to handle emails that fail authentication (e.g., reject or quarantine) and provides reports on domain activity.
Guide & best practices
DNS Check – inspect DNS records online
Check DNS records, spot common configuration issues and get a clear basis for DNS, mail and domain diagnostics.
What is a DNS check?
A DNS check queries the public DNS records of a domain and shows how resolvers find your website, mail servers and security policies.
Which record types are checked?
Balou Tools focuses on key records such as A, AAAA, CNAME, MX, TXT, NS, SOA and CAA, plus SPF, DMARC and DNSSEC signals.
Understanding the DNS health score
The score rates signals such as reachable name servers, consistent mail records, valid TXT entries and security-related findings.
Fixing common DNS issues
Typical issues include missing MX records, conflicting SPF entries, stale CNAME targets, unsuitable TTLs or inactive DNSSEC.
Frequently asked questions
Which DNS records exist?
Common DNS records include A, AAAA, CNAME, MX, TXT, NS, SOA and CAA. TXT records are also used for SPF, DMARC and provider verification.
What is DNSSEC?
DNSSEC cryptographically signs DNS answers so resolvers can verify that a response is authentic and unchanged.
Why is my MX record wrong?
Common causes are typos, missing priorities, unresolved mail hostnames or outdated provider records. MX records should point to hostnames, not IP addresses.
How long does DNS propagation take?
Propagation depends mainly on TTL values and resolver caches. Many updates appear within minutes, but old cache entries can last 24–48 hours.