EXIM SMTP allows to send mails without login / authentication via telnet to any domain

[Emrah]

Hello,
How we can solve this problem?

"EXIM SMTP allows to send mails without login / authentication via telnet to any domain"

 

[quietFinn]

Hello,
How we can solve this problem?

"EXIM SMTP allows to send mails without login / authentication via telnet to any domain"

What do you mean by "to any domain"?

 

[cPanelLauren]

Also can you give some context @Emrah? The following thread also may offer some information/clarification: Stop Mail Relay

Furthermore, I'd suggest you go over the following guidelines to understand better what is helpful in a forums thread: In Progress - Guide To Opening An Effective Forums Thread