I have a new install of zimbra 7 open source. I am not able to connect from a mail client(outlook) on port 25 and 110 inside my LAN.
I have set outlook to use port 25 and 110 with no encryption and "my outgoing mail server requires authentication" is turned on. Port 995 and 587 work fine.
I am getting the error below on outllok
"Log onto incoming mail server (POP3): Your e-mail server rejected your login. Verify your user name and password in your account properties. Under Tools, click E-mail accounts. The server responded: -ERR invalid command"