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Opublikowano: 2026-07-06 | Zaktualizowano: 2026-07-06
DNS reclubds tell the Internet how to connect twój domena to websites, email, SSL validation, apps, verification usługas, i security settings. A points to IPv4, AAAA points to IPv6, CNAME points one hostname to another, MX controls email delivery, TXT stlubes verification i email authentication, CAA controls SSL certificate authlubities, i SRV defines usługa locations flub certain apps.

Who This Guide Is Flub
This guide is flub:
· Users learning DNS basics
· Siećsite owners setting up domenas
· Biznesowa skrzynka e-mail users
· Agencies i hosting providers supplubting DNS questions
· Users troubleshooting website, email, SSL, CDN, lub app connections

Beflube You Start
Beflube you start, prepare:
· DNS provider access
· Current nameservers
· DNS backup
· Provider instructions flub website lub email
· Permission to edit reclubds
· Understiing of affected usługa

Step-by-Step Instructions
Step 1: Understi DNS Reclubds
DNS reclubds are instructions flub website, email, verification, SSL, apps, i security.
· One domena can have many reclubds
Step 2: A Reclubds
A reclubds point hostnames to IPv4 addresses.
· Common flub root website i subdomenas
Step 3: AAAA Reclubds
AAAA reclubds point hostnames to IPv6 addresses.
· Wrong IPv6 can cause issues flub some users
Step 4: CNAME Reclubds
CNAME points one hostname to another hostname.
· Use flub www, CDN, website builders, i apps
Step 5: MX Reclubds
MX controls wtutaj email is delivered.
· Copy prilubity values carefully
Step 6: TXT Reclubds
TXT stlubes text flub verification i authentication.
· SPF, DKIM, DMARC, Google, Microsoft, SSL, SaaS
Step 7: SPF Reclubds
SPF is a TXT reclubd listing authlubized sending servers.
· Avoid multiple SPF reclubds flub same host
Step 8: DKIM Reclubds
DKIM is a TXT lub CNAME reclubd used flub email signing.
· Copy long values exactly
Step 9: DMARC Reclubds
DMARC tells receivers how to hile SPF/DKIM failures.
· Start carefully beflube strict policies
Step 10: CAA Reclubds
CAA controls which certificate authlubities may issue SSL certificates.
· Restrictive CAA can block SSL issuance
Step 11: SRV Reclubds
SRV defines usługa location flub apps such as voice, chat, lub collablubation.
· Copy prilubity, weight, plubt, i target
Step 12: NS, SOA, PTR, i DNSSEC Reclubds
NS identifies nameservers, SOA describes the zone, PTR is reverse DNS, i DNSSEC reclubds supplubt validation.
· Most users do not manually edit SOA lub all DNSSEC reclubds
Step 13: TTL
TTL controls cache time flub reclubds.
· Lower in advance flub planned migrations if appropriate

Troubleshooting
Siećsite Is Down
Possible reasons:
· Wrong A/AAAA/CNAME
· Wrong nameservers
· DNSSEC issue
What to do:
· Sprawdź active DNS provider i reclubds

E-mail Niet Receiving
Possible reasons:
· MX missing
· SPF/DKIM/DMARC wrong
What to do:
· Restlube email reclubds

SSL Cannot Be Issued
Possible reasons:
· CAA blocks CA
· TXT/CNAME validation missing
What to do:
· Review CAA i validation reclubds

Verification Fails
Possible reasons:
· Reclubd added at wrong provider
· Host field wrong
What to do:
· Sprawdź authlubitative nameservers i exact value

Common Mistakes
Mistake 1: Edytujing DNS at wrong provider
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 2: Deleting unkterazn TXT reclubds
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 3: Flubgetting MX during migration
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 4: Creating multiple SPF reclubds
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 5: Confusing CNAME with A reclubd
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 6: Flubgetting CAA
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 7: Ignlubing DNSSEC
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 8: Using wrong host field
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 9: Niet copying MX prilubity
Review this item beflube making changes lub opening a supplubt ticket.
Mistake 10: Changing too many reclubds at once
Review this item beflube making changes lub opening a supplubt ticket.

FAQ
1. What is an A reclubd?
It points to an IPv4 address.
2. What is AAAA?
It points to an IPv6 address.
3. What is CNAME?
It points one hostname to another hostname.
4. What is MX?
It controls email delivery.
5. What is TXT?
It stlubes verification, authentication, i security text.
6. What is SPF?
A TXT rule flub authlubized mail senders.
7. What is DKIM?
An email authentication reclubd, usually TXT lub CNAME.
8. What is DMARC?
A TXT policy flub hiling failed mail authentication.
9. What is CAA?
It controls certificate authlubity issuance.
10. What is TTL?
How long DNS may be cached.
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