It is 100% illegal.
The fines are pretty harsh in Europe.
We are talking about hundreds of thousands of Euros - if I remember correctly.
Might even be worse. Arrests wouldn't surprise me, although I have never heard anyone getting busted for it.
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EDIT @Grok:
Maximum Fines:
- Up to €20 million or 4% of the organization’s global annual turnover (whichever is higher) for serious infringements, such as processing personal data without a lawful basis or failing to honor data subject rights (e.g., opt-out requests)
- For less severe violations (e.g., inadequate transparency or documentation), fines can reach up to €10 million or 2% of global annual turnover
- Applicability: Applies to organizations processing personal data of EU/EEA residents, even if the organization is based outside the EU
- Examples of Violations:
- Sending cold emails without prior consent or a legitimate interest.
- Failing to provide an easy opt-out mechanism.
- Not maintaining records of how email addresses were obtained or consent was secured.
In some cases, national data protection authorities (DPAs) can impose administrative fines or pursue criminal penalties, including imprisonment (e.g., up to 6 months in Norway for severe violations under its Marketing Control Act).