fer manual for details.
;IP = 0.0.0.0
; Default is 0.0.0.0
; Specifies the machine IP to use
; Th... ult setting means automatic IP detection
; Use this setting only, if you run more than one IP on your David server
;Port = 25
; Default is 25
; Specifies the TCP port to listen on, for incoming SMTP connections
; Do not change this settin