The following links provide information regarding the legal obligations and guidelines pertaining to email and SMS:

Australia: The Spam Act 2003

New Zealand: The Unsolicited Electronic Messages Act 2007

United States of America: The Can-Spam Act

Canada: CASL

Europe: GDPR

It is your responsibility to ensure that you comply with the laws relevant to your location.

You may also wish to refer to ActivePipe's Terms & Conditions