Secret Mail mass Promotion technology

Believe that a lot of webmaster are lazy, I believe many owners have used to promote the site of mass mail, but also believe that most of the webmaster think that if the message sent out and into the inbox effect is very obvious. So how does the mail go out? How do I get into the inbox? How does the email server judge your http://www.aliyun.com/zixun/aggregation/12915.html "> spam?" I will talk about this issue based on my one-month experience in mail-sending.

Let's start with two ways to send mail. One is the DNS speedpost, either through an SMTP server or a relay server. DNS SpeedPost is to use the Internet DNS server directly sent out mail, this does not go through the SMTP server, that is, not through the smtp,126.com,smtp.tom.com these, so the letter name can be arbitrarily taken, the sender's mailbox can also casually, so you can be anonymous. So that we can say, so we can use such a DNS server has been hair all the time ah. Wrong。 For example, we send to QQ or send to 126, their servers can be judged from the DNS sent the letter. Foxmail is the function of the DNS SpeedPost, is only a single send, you send it, sent to the QQ mailbox, is into the dustbin, and then send a few more, directly to receive. Currently on the market many bulk mail or use of this technology, I would say that the DNS group has been dying. The success rate is very low. Software is a bluff.

Then only through the SMTP server to send. There are many techniques and experiences in this process. Sometimes back to the letter how I do not know why, and then studied for one months on the general groping out, today to share my experience to everyone.

We must first understand the process of the letter. POP3 is the recipient, SMTP is the letter. I'll draw a picture for you to see. For example, we use Tom's mailbox to send a letter to QQ. Then it is:

The IP and form of the message sent (either on the Web or on the client side)--pop3.tom.com--smtp.tom.com--pop3.qq.com

We can understand this picture clearly. Our mail content, IP address, the form of the letter is by our credit relay server POP3 judgment. Finally to send to which mailbox, he judged is the relay server and our mail content.

After a lot of my test (we sent the target is QQ mailbox)

The POP3 of the 1.tom mailbox does not judge the message sent. All accepted. But next time to send QQ. QQ will make judgments. The basis of the judgement is the content of the mail, so to modify the content of the message is not advertising, but the same frequency, such as a 1W send, will be QQ judge as spam. So that the letter back to Tom's mailbox.

2.foxmail Mailbox is Tencent's product. The technology is the same as QQ mailbox, the first to determine the routing of IP and content, content to do the best (not be judged as spam) IP fixed, about 400 blocked. Directly to Foxmail's POP3. So the way to deal with this is to switch IP.

3. Own peanut shell dynamic Domain name analysis to build the local SMTP and POP3 server, our own POP3 and SMTP, there is no verification, so all can be sent out, and then sent to QQ, for this inexplicable SMTP server, QQ judge the basis of the first is the frequency limit, Our SMTP is too frequent to the QQ mail server to send mail, resulting in a return. If you still send it frequently, your email address will be blocked, and frequently, your SMTP address should be blocked.

4. Other mailboxes.

Sina's POP3 to judge the client, if it is not OE or foxmail class of well-known software or in the web of the Sina mailbox sent, directly to the POP3 server.

Gmail sent to the QQ mailbox, received.

Send with Sougou mailbox. Not receive.

e-Mail can only be sent to its users when the client is set up. Failed。

QQ after 10 minutes after receiving a letter from Gmail.

Smtp.yeah.net test failed.

Sina sent successfully, note that after the registration of the mailbox to open POP3 and SMTP in the account settings. But QQ did not receive. Can be sent out in the mailbox. Not be sent out in the software. It is estimated that Sina has made a judgment on the sending end.