known as unsolicited bulk Email, junk mail, or unsolicited commercial email, is the practice of sending unwanted e-mail messages, frequently with commercial content, in large quantities to an indiscriminate set of recipients.
An electronic message (email spam) is "spam", if following occurred:
1. the recipient's personal identity and context are irrelevant because the message is equally applicable to many other potential recipients;
2. the recipient has not verifiably granted deliberate, explicit, and still-revocable permission for it to be sent;
3. the transmission and reception of the message appears to the recipient to give a is proportionate benefit to the sender.
I hate email spam, i believe if we do not stop it, email spam will become "the killer" of email marketing.
Please give your suggestion to stop email spamming, to ensure healthy development of email marketing.