Reason 1, the domain name Mx record is not parsed
The following is an explanation of the mydns function of Xinwang:
For example, domain name
First, you need to parse an A record in the A record to your server IP.
Then, in MX parsing, parse, write host name, pay attention! ! !
It is a parsed MX record, not a parsed MX record, which is where ordinary users make the most mistakes.
Cause 2, Firewall or Port Conflict
The email address requires port 25,110. Please check whether this port is opened and whether it conflicts with the smtp port in IIS. Smtp in IIS can use port 26.
The following is an explanation of the mydns function of Xinwang:
For example, domain name
First, you need to parse an A record in the A record to your server IP.
Then, in MX parsing, parse, write host name, pay attention! ! !
It is a parsed MX record, not a parsed MX record, which is where ordinary users make the most mistakes.
Cause 2, Firewall or Port Conflict
The email address requires port 25,110. Please check whether this port is opened and whether it conflicts with the smtp port in IIS. Smtp in IIS can use port 26.