Hi, I can telnet to my zimbra installation on port 110, but anything I type returns with -ERR invalid command, like Escape character is '^]'. +OK POP3 ready USER xxxxxxx -ERR invalid command PASS xxxxxxx -ERR invalid command and it refuses to transfer mail. I am running zimbra-core-8.0.6_GA_5922.RHEL6_64-20131203103705.x86_64 Any ideas?