Yes, it is however you do have to comply with the CAN-SPAM act of 2003.  This requires 3 key things:

  1. The email must be relevant to the audience (don't spam offerings of little blue pills).
  2. The sender must be identified in the email (WhoKnows takes care of this).
  3. There must be an unsubscribe link (WhoKnows takes care of this too).

WhoKnows ensures all our campaigns are CAN-SPAM compliant, so you don't have to worry.

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