Using Terminal command "mail"

Hello,
i want to use the terminal or console based "mail" command.
how can i define the outgoing data like i.e. server ?
Best regards
fidel

Hello,
to be more detailed:
i am using nagios using macports on mac-os x too monitor some macs/pc's in my company.
as i want the nagios-host/server to notife me in case of problems i need this console based mail feature.
nagios doc says:
check if mail command is working in 99 % of all cases nagios can send in this case automaticly.
thats why i am asking :P
back to mail:
am i forced to use sendmail ?
or can i use any other MTA in OS X ?
im wondering that it seems like nearly noone inhere is working with terminal based apps...
best regards
fidel

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Using Terminal command "mail"

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