Answer:
Spam
Explanation:
If you receive in bulk the unsolicited messages, then that does mean that your inbox is being spammed. This will not harm you but you will lose the Gb that is allocated to your mailbox. And if you will not check then your mailbox will soon be full, and you might not receive some of the important messages that you should reply to immediately.
The answer for this question is YES
Effective not effectove. These are guidelines:
Be brief.
Have a short opening sentence or paragraph that puts the matter in context.
Use the middle paragraph(s) to cover the matter(s) in hand.
Close with a clear agreement of what will be done, by whom, and by when.