Unable to telnet on port 143 on the public ip of the server
I have a mail server behind a firewall ( ASA 8.3 ), and I have made the configuration in order to telnet on port 143 ( natting and access rule ), but when I try to telnet to the server from the inside ( telnet on the private ip ) I get the following response : OK the Microsoft Exchange IMAP4 service is ready. But when I try it from the outside ( telnet on the public ip ) the port seemes to be opened but I get a blank screen without the message. I have removed the inspection also but nothing happened.
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