What are the conditions for opening port 25?

I need a mail server to use the email authentication function in the service I am developing.

And I developing groupware for our employees to use.

Among them, there is a webmail function, and I think it is necessary to send and receive mail.

However, I issued a ticket requesting the opening of port 25 and received a reply from the staff that I could not open it.

Please check the conditions required to open port 25.


  • Hello Henry,

    The support team has the specific information about your account and can answer that question for you. Please follow-up in your ticket for the fastest response. The ticket system is secure and protects your privacy, unlike a public forum.

    --- David

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