How To Detect Disposable Email Domains Without Relying On 3rd Party APIs And Lists
Security Boulevard, Wednesday, October 22nd, 2025
To scale a fraud or bot attack, adversaries need more than just realistic automation. They need infrastructure.
- Proxies to spread activity across thousands of IPs (ideally geolocated near the target)
- Fake accounts to register or log in without triggering rate limits or blocking rules
And for most fake accounts, you need an email address. Creating fake Gmail or Outlook accounts is possible, but costly. These platforms deploy anti-abuse systems, making it harder to register accounts at scale without phone verification or behavioral challenges. Attackers still find ways (we see plenty of bots using Gmail addresses), but disposable email providers remain a far cheaper and faster alternative.