Incoming mail sent to local users who don't exist should be...
...returned to sender with a 'no such user' warning
When this option is enabled, messages that arrive at the server destined for unknown yet supposedly local users will be returned to the message originator.
Send message to the "postmaster" user
By default, messages that arrive at the server destined for unknown yet supposedly local users will be forwarded to whatever user has been aliased as the postmaster. Disable this option if you do not wish to send these messages to the Postmaster.
Place message in bad message directory
By default, messages that arrive at the server destined for unknown yet supposedly local users will be routed to the bad message queue. Clear this checkbox if you do not wish to send these messages to the bad message queue.
Enable advanced options
Click this checkbox to enable the following advanced mail routing properties.
Send the message to this host
If a mail host is specified here, messages addressed to unknown local users will be sent to it.
The following applies globally anywhere within MDaemon where you are allowed to specify a host to forward, copy, or send email to. If you enclose the host in brackets (e.g. [example.com]), MDaemon will skip MX record lookups when delivering to that host. For example, if this option contained "example.com" then MX lookups would be performed normally. If, however, that option contained "[example.com]" then only the A-record lookup would be performed.
Use this address in SMTP envelope
This address will be used in the SMTP "Mail From:" statement used during the session handshaking with the accepting host. Normally the sender of the message is used in this portion of the SMTP envelope. If you require an empty command (MAIL FROM <>) then enter "[trash]" into this control.
Use this TCP port
MDaemon will send this message on the TCP port specified here rather than the default SMTP outbound port.