A Strange Week of Subscription Bombing on Our Support Inbox

One day, our support inbox suddenly filled up with registration emails from real services we had never signed up for. Apparently, this kind of inbox flooding has a name: “Subscription Bombing.” Here’s a small operational story about modern spam and reducing impact instead of chasing perfect prevention.

2026/05/14 · Aiko Yokoyama

Great Systems Are Quiet

Well-designed systems are quiet. They handle failures behind the scenes and allow users to complete tasks without friction. This article explores why “quiet design” matters.

2026/05/12 · Aiko Yokoyama

Systems Should Assume Failure

Communication does not always succeed. SMS delivery depends on multiple layers including networks and filtering systems. Designing for retries and fallback mechanisms is essential for building reliable systems.

2026/04/27 · Aiko Yokoyama

Users Don’t Read Messages

Users don’t read messages carefully—but they still act. This article explores how human behavior shapes system design, and why SMS and OTP work so well.

2026/04/15 · Aiko Yokoyama

[EZSMS]Sub-account Feature Now Available for Pre-pay Users

Until now, the EZSMS sub-account feature was available only to　contracted (Post-pay) users. We are pleased to announce that, in response to customer requests, the sub-account feature is now also available to Pre-pay users.

2026/03/04 · Aiko Yokoyama

Why SMS Is Well Suited for Authentication

Why is SMS so well suited for authentication? By avoiding replies and conversation, SMS enables identity verification that is simple and less prone to failure. This article explores why SMS continues to be a standard method for authentication today.

2026/02/05 · Aiko Yokoyama

Sometimes, the Kindest Message Is the One That Doesn’t Require a Reply

Most communication tools are designed with replies in mind. SMS is different. It asks for no reply, no read receipt, and creates no psychological pressure. This article gently explores why SMS continues to be used for authentication and notifications.

2026/01/16 · Aiko Yokoyama

Account Security Enhancements – New Features

At Xoxzo, we are continuously working to improve the security of our platform

2026/01/15 · Aiko Yokoyama

Start Small, Protect Properly: Introducing SMS Authentication for “Light Usage”

SMS authentication is not just for large-scale services. Even with a small number of users, security should never be compromised. Xoxzo has long supported small businesses and individual developers by meeting the need for light usage SMS authentication.

2025/12/16 · Aiko Yokoyama

2025 & 2026 Seasons Greetings and New Year Holidays

Thank you for supporting Xoxzo and EZSMS through 2025. Here is our Holiday announcement for this year.

2025/12/03 · Aiko Yokoyama