What are the key requirements under each?

Here's what you actually need in place for each major APAC email law, by country.

Australia (Spam Act 2003): Consent (express or inferred from a business relationship) before sending, accurate sender identification, a working unsubscribe honored promptly, and no harvested lists. ACMA enforces aggressively. Penalties up to $2.22 million AUD per day for serious violations. Both the sender and the company whose products are advertised share liability.

Singapore (PDPA): Consent before collecting or using personal data for marketing. Check the Do Not Call Registry before any messaging, even if you have other consent. Document your consent records. Penalties up to $1 million SGD for organizations.

Japan (Act on Specified Electronic Mail): Opt-in consent for most commercial messages before sending. Preserve consent records. Specific rules apply for mobile messaging. Individual criminal liability is possible, not just corporate fines.

India (DPDP Act 2023): Consent with clear notice explaining the purpose. Subscribers have rights to access, correct, and erase their data. Implementing regulations are still being clarified. Default to strong consent practices until the specifics are finalized.

Across all APAC laws: document consent obtained, keep records of unsubscribe processing, and include clear sender identification. Most APAC laws hold both the sender and the company whose products are promoted jointly liable.

The pattern is consent-first, everywhere. If you can check the following, you're well-positioned: valid consent documented for each APAC contact, functional unsubscribe in every message, and clear sender identification. Start by auditing your APAC subscriber list for consent status, then verify your unsubscribe mechanism works across all channels you use to reach them.