Hello, I have deployed IceWarp mail server behind a router CISCO RV042 gigabit with the latest firmware. If the counterparty Microsoft Exchange 2010 mail server can not send them any emails as Microsoft and Cisco will respond somehow translates badly. Something I read here: https://www.experts-exchange.com/questions/28444013/Exchange-2010-intermittent-error-5-3-3-unrecognized-command.html , but I could find about this issue any option on the RV042 settings. How can we solve this problem? Thank you.
I need to get the product telnet, which I ran as follows:
192.168.1.1/sysinfo123.htm?ConsoleSimulation=1 and enter the following command for the correct functioning of the smtp server: "no fixup protocol smtp 25". How else can I choose?
Thank you
