I've got a Java program that sends email. Instead of using my ISPs SMTP I'd rather use SendMail from my Linux Server. I know Sendmail is set to run already but how can I check its status and open it so I can connect to it through my main box (which is located on the LAN)? I heard by default it's only set to take local connections. Just so you know, Samba is running so I can already access the box. Thanks for any help.

ahhhhhhhhhhhhhhhh sendmail run run run for your lives. I had a lot of trouble with it a while back and this help could be a bit spotty.

if you just want to send from inside a lan add the computers ips to /etc/mail/access.

If you want to be able to let them send from anywhere you have two choices can use this big complicated dns thing that I don't understand (protects against spam i think).

or you can turn your server into an open relay which can make it a target for spam (what I do but I haven't had a problem yet) do this by making sure you have this in your /etc/mail/sendmail.mc

FEATURE(`accept_unresolvable_domains')dnl

you might also need to have this in there to
FEATURE(`promiscuous_relay')dnl

make sure this is uncommented
DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')

after making changes to this file be sure to run

m4 /etc/mail/sendmail.mc > /etc/sendmail.cf

and restart sendmail