Email Spam is Unsolicited Bulk Email (UBE) or Unsolicited Commercial Email (UCE).
Unsolicited means that you lack affirmative consent from the recipient. If you found an address on a web page, on a mailing list, or on Usenet, you don't have consent. If you received an address in gift, sale or trade, you don't have consent. If someone gave you an address for a particular purpose (for example, a commercial transaction, information about your products, or after-sales support) you only have consent to use it for that particular purpose. Use for any other purpose requires a new consent.
Bulk means that you sent a substantively similar message to more than 500 addresses a day. A message that differs from recipient to recipient only by details (e.g. the recipient's name, account number, blocks of random words, characters, numbers, or non-rendered text) is the same message. A message that uses different wording to express the same idea is the same message. If you send the same message to 500 different people day after day, it's Spam.
Important Note: While we do allow our clients to send list emails, these lists must be valid opt-in/opt-out mailing lists. We generally do not limit the size of your lists unless it affects server performance. If we receive excessive reports of spam abuse, we will contact you and instruct you to take action. If no action is taken on your part, we reserve the right to suspend your account.
