Email Email: Mail cannot be sent normally, or you cannot send it to a mailbox. The order is as follows: Line: 1, DNS is invalid, and the other domain name cannot be parsed. Solution: Replace the DNS server. The operation is as follows: setup-primary domain-dns updated DNS. For example: 202.96.134.133 202.96.128.68 It is preferred to be the DNS2 of local telecommunications, the IP address of the mail server exists in the peer spam database, causing the message to reject. Solution: Connect to the peer mail server network management, establish a green channel; contact the management personnel of the spam database to place the IP address from the database; however, if your server continues to send spam, I don't want to use it. If you want to test whether the server IP address is in the spam database, send the server IP address to support@comingchina.com, indicate the IP address test, we give you test. 3. The mail is in line with certain filtering rules. For example: Domain name MX records and server IP records are not in; if the domain name service provider must check if the MX record is correct. 4, the other mailbox space is full. No longer receive mail. 5. Line failures between the other party mail server or both ends. In short, there is a problem, first check the return letter, check the MDaemon-SMTP- (OUT) .log file analysis problem. ---------- Server configuration: 1, in the MD control interface, there is a three small lights in the upper right, don't press 2, check if the email is prohibited from sending 3, check the settings to send mail Whether the size meets the need 4, check whether the mailbox space is full, if space is full and set backup, send mail with Webmail will fail every day, there are a lot of people asking why mail can not make it, look at this Let's write a checklist that receives an email error later.
