believe that many webmaster is lazy, I believe that many owners have used bulk mail to spread over the site, also believe that most of the webmaster all think that if the bulk mail is sent out into the inbox and the effect is obvious. Then how to send out the mail? How to enter the inbox? How does the mail server decide your spam? I talk about this problem according to my experience of more than one month of sending mail.
first, let’s talk about the two ways to send mail. One is DNS express mail, one is through the SMTP server, or the relay server. What is the use of DNS express mail out online directly send the DNS server through the SMTP server, which is not through the SMTP, 126.com, smtp.tom.com, so the letter name can literally take, the sender’s e-mail can also be easily, so it can be anonymous. In this way, you can say, then, we can use this DNS server has always been issued ah. Wrong。 For example, we send it to QQ or to 126, and their servers can be judged that the letter was sent from DNS. Foxmail is the function of DNS express mail, but only a single send, you send it to the QQ mailbox, it is into the dustbin, and then a few more, it can not be received directly. Currently on the market a lot of mail mass or use this technology, I would say, DNS mass has been no good. The success rate is very low. Software is a flicker of people.
then it’s only sent through the SMTP server. This process has a lot of technology and experience in it. Sometimes before I do not know what reason, a month later research on roughly out today, put my experience to share with everyone.
, you first need to understand the process of sending letters. POP3 is the recipient, and SMTP is the sender. I’ll draw a map for you to see. For example, we use Tom’s mailbox to send letters to QQ. So, that’s
sends the IP and form of mail (on the web side or on the client) – pop3.tom.com – smtp.tom.com – pop3.qq.com
we can see the diagram clearly. Our email content, IP address, and the form of the letter are determined by the POP3 of our credit relay server. Which mailbox will be sent to the end? He judges the relay server and our mail contents.
passed a lot of my tests (we sent the target QQ mail)
The POP3 of the
1.tom mailbox does not judge incoming messages. Accept all. But when you send it to QQ next time. QQ will judge. The basis of the judgment is the content of the mail, so it is necessary to change the content of the message without advertising, but the same frequency, such as sending a 1W envelope once, will also be judged as spam by QQ. Thus returning to Tom post.