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AustraliaSender identity

Sender identity rules for emails in Australia

Every commercial email must clearly and accurately identify who authorised it and how to contact them, and those details must stay valid for at least 30 days.

The law
Spam Act 2003, section 17
Who enforces it
Australian Communications and Media Authority (ACMA)
Penalties
Court penalties reach 1,000 penalty units a day for a company, or 5,000 with a prior record. Check ACMA for current dollar amounts.

What it means for your email

  • Every commercial email with an Australian link must clearly and accurately identify the individual or organisation who authorised it.
  • It must include accurate information about how the recipient can readily contact them.
  • That information must be reasonably likely to stay valid for at least 30 days after you send.
  • ACMA says to use the correct legal name of your business, or your name and Australian Business Number (ABN).
  • If someone else sends for you, the email must still identify you as the business that authorised it.

Do

  • Put your legal business name, or your name and ABN, in every marketing email.
  • Give a contact route people can actually use, such as an email address, phone number or postal address.
  • Make sure agencies and platforms sending for you name you, not themselves.
  • Keep contact details working for at least 30 days after each send.

Don't

  • Don't send under a vague name that hides who authorised the email.
  • Don't use a contact address that bounces or isn't monitored.
  • Don't help or arrange for someone else to send emails that break this rule: that is also a breach.

Good to know

  • Unlike the unsubscribe rule, this applies to designated messages too, such as those from charities, government bodies and educational institutions.
  • The unsubscribe is a separate requirement. See the Australia unsubscribe card.

Sources

Researched by Mailfois · 2026/27 edition · checked 20 October 2026

Not legal advice. This is a plain-English summary. Check the sources for anything specific, or take professional advice. Spotted something out of date? Email [email protected] and we'll credit you if you'd like.

Related rules

Check every email before it goes, in every market.

Open the pre-send checker