Skip to content
DNSTECHNICZNE
TechnicalHow it works under the hood

DNS — PTR record

Pointer record (reverse DNS)

The reverse of an A record: maps an IP address to a server name. It is set by the IP address owner, typically the server provider, not the domain owner.

Why it matters

Email servers check whether the name in the PTR record matches how the server identifies itself. A mismatch is one of the stronger spam indicators.

What's missing without it

Without a correct PTR record, email sent from your own server will be heavily filtered into spam, and some recipients may reject it outright during connection.

When it is used

When setting up your own email server or sending newsletters from a dedicated IP address.

How we use it

203.0.113.10 → mail.nazwa-domeny.pl

Numbers worth knowing

Technical in data

26%

Prognozowany udział w pełni elektrycznych pojazdów (BEV, bez hybryd) w europejskim parku samochodowym do 2035 roku, w porównaniu z 4% w 2025 r.

BCG2035Europe

88%

Meta podaje, że ponad 88% z 137 000 usuniętych reklam oszukańczych w Polsce zostało wykrytych automatycznie przed zgłoszeniem.

Meta09/2026Poland

2 500 000 000 000 USD

Prognozowane światowe wydatki na AI w 2026 roku.

Gartner2026global

Figures from the same field — collected in our market data base.

Related terms