Dear Yahoo Mail Support Team,

I am writing to bring to your immediate attention a severe and ongoing abuse of your email alias feature that is directly harming legitimate Yahoo Mail users, including myself.

As you are aware, Yahoo Mail allows up to 500 disposable aliases per account. Unfortunately, this feature is being systematically exploited by malicious actors to mass‑register accounts on OpenAI’s ChatGPT platform. These individuals use hundreds of Yahoo aliases to create multiple ChatGPT accounts in violation of OpenAI’s terms of service.

In response, OpenAI has begun flagging and blocking large numbers of Yahoo Mail addresses – including entirely legitimate ones. As a direct consequence, my own personal ChatGPT account, which I use for legitimate purposes, was recently banned by OpenAI. The only reason for this ban is that my underlying email domain (yahoo.com / yahoomail.com) has been associated with the widespread abuse of aliases originating from your service.

This situation is unacceptable. Law‑abiding Yahoo Mail users are being punished for a vulnerability that exists entirely within your system’s design. While aliases are a useful feature, the ability to create up to 500 per account with no meaningful oversight has turned Yahoo Mail into a tool for large‑scale platform abuse. The damage is no longer hypothetical – it is actively destroying my access to critical online services.

I request that Yahoo Mail take the following actions immediately:

Review and restrict the alias creation mechanism – for example, limit the number of aliases that can be created per day or require additional verification steps.

Contact OpenAI to identify and whitelist legitimate Yahoo Mail users who have been falsely banned, and work with them to stop accepting alias‑based registrations.

Notify all Yahoo Mail users about this abuse and warn that misuse of aliases may lead to external platform bans affecting everyone.

Please treat this as a high‑priority security and user trust issue. I expect a formal response detailing the steps Yahoo will take to remedy this problem. Failure to address this will force many legitimate users to abandon Yahoo Mail permanently and may expose Yahoo to reputational and legal risks.

Thank you for your immediate attention to this urgent matter.

Sincerely,
Frank