Roman Kozłowski

Choose an email API when email is part of your application logic and you need granular control, structured error handling, or real-time event data. Choose SMTP when...

Black Friday rewards scale, but email deliverability punishes careless changes in scale. When sending volume and frequency rise within days, weaknesses that barely...

An SMS gateway is the infrastructure that connects business software with mobile carrier networks. It accepts a message from an application or sending platform,...

A phone number can pass every format check you throw at it and still be dead. The digits are right, the country code is valid, the length matches the national plan,...

On 2 August 2026 a wave of headlines told marketers that from now on they must label everything they create with artificial intelligence as created with AI. That...

Text "JOIN" to 12345 and you've already used an SMS keyword. The word you send – JOIN – is the keyword. The number you send it to – 12345 – is the short...

The verification code you last typed into an app or a service probably didn't arrive from that app's own servers. It came from a CPaaS – a communication platform...

Omnichannel customer support connects every channel your customers use – from email, SMS, chat, WhatsApp, phone, to social – into a single, continuous experience....

TL;DR: SMS deliverability is not a single number. It is the ability of a communication system to successfully get text messages to recipients' devices, shaped by...