65%
Odsetek ankietowanych Polaków deklarujących korzystanie z narzędzi AI według raportu „E-commerce w Polsce 2026”
IAB Polska2026Poland
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
470 000 000 000
IDC Worldwide AI and Generative AI Spending Guide 2026 V2 prognozuje, że europejskie wydatki na AI osiągną blisko 470 mld dolarów do 2030 roku
IDC09/2026Europe
470 000 000 000
Prognozowane całkowite wydatki na AI w Europie w 2030 roku według IDC Worldwide AI and Generative AI Spending Guide 2026 V2
IDC09/2026Europe
Figures from the same field — collected in our market data base.