Top ten features of spam

Sent through non-standard clients, which is a major feature of spam, we can find the top ten key features of spam by comparing messages sent by standard clients such as Outlook Express,webmail. (1) No mailer letterhead, or using a special mailer letterhead, we see an email message from Outlook that has a section of X-mailer:microsoft Outlook IMO that indicates the sending client, build 9.0.2416 (9.0.2910.0) and spam or not, or have signature letterhead, such as x-mailer:ehoosend ... (2) Polite courtesy of the spam message, will be a lot of polite, such as "please delete" "Sorry to Disturb" "Disturb .... Excuse me. (3) Forgery Sender SMTP command inside the mail from and the letter from inconsistent sender's email is not a real email (4) through dynamic IP sent by ADSL external users directly connected to the MX server via dynamic IP, No SMTP service is available locally (cannot telnet port 25), IP is not possible to reverse interpret (5) Send tool signature Some shared mass tools have their own signature in each letter sent (6) Do not use standard MIME format message format is not standard, but outlook Express can also be compatible (7) Send time more than current time some spam in order to maintain a ranked first position on the client, the sending time will be forcibly modified to a prior time, such as January 1, 2005. (8) After a lot of server forwarding in the letterhead has more than 3 recived: (9) The letter body content with special HTML tag in order to embed more content and script, spam will often use some general mail will not use HTML tag such as IFRAME, frameset, Object, etc. (10) The content of the letter has a unsubscribe or no longer accept the description of the message this is often the sender of a larger trap, once the point to repel a set of connections, you will receive more spam. Responsible Editor Zhao Zhaoyi#51cto.com TEL: (010) 68476636-8001 to force (0 Votes) Tempted (0 Votes) nonsense (0 Votes) Professional (0 Votes) The title party (0 Votes) passing (0 Votes) The original text: The top ten features of spam return to network security home