| It makes it clear that senders cannot send such messages unless they have the recipient's prior consent. |
| To the initial frustration of some of the senders, he didn't open the packages. |
| These last for about 30 seconds or so, and will ricochet enemy fire right back at their senders. |
| Anti-spam systems also keep blacklists of known spammers, as well as lists of approved senders. |
| Educate your employees about the dangers of opening e-mail attachments, particularly from senders they do not know personally. |
| Your unsummoned presence seems to say that there is such concern among your cryptic senders. |
