I use postfix along with cyrus for my mail server and everything is working fine up until I try to connect to my server:
telnet localhost 25
Connected to localhost (127.0.0.1).
Escape character is '^]'.
220 mail ESMTP Postfix (2.0.6) (Mandrake Linux)
mail from: edwin at nameless.org
rcpt to: edwin at localhost
555 Unsupported option: at
which is pretty unfortunate, don't you think?
Do you know what might be wrong with my postfix settings?