Fedora :: Getting A Mail Server To Work?

My offie machine is running a version of RedHat Enterporise Linux, and at home I am running Fedora 11. I am tryto configure my office machine so that I can use it as an outgoing mail server for my home machine using port 587. I've made the changes to sendmail.mc which are supposed to enable this, and nmap run on my home machine shows that port 587 is open on my office machine for submission. Also telnet office-machine 587 gives me exactly the same dialog as does telnet office-machine 25.So I think I am on the righ t track. But I haven't been able to configure either evolution or thunderbird on my home machine so it uses my offie machine as outgoing mail server. I've tried absolutely every possible configuration of those programs and none of them works. But I do have some additional bit of information. If I configure t hunderbird to use name and password Use secure authetication C onnection security None, then I am asked to enter a password, but nothing I try works.

The one bit of additional information is the following message in /var/log/messages on my office machine sendmail[28289]: unable to open Berkeley db /etc/sasldb2: No such file or directory That is indeed true. There is no such file. What does this mean, and is there something I can add to deal with the problem?

If I choose SSL/TLS for connection security instead, I get a connected to message which sits there working and eventually times out. When it does. /var/log/maillog says that sendmails tells me that my home machine "did not issue MAIL/EXPN/VRFY/ETRN during connection to MSA"

I don't know if that tells me anything or just means that nothing happened. I had no trouble using evolution or thunderbird with my office machine as outgoing server at port 25, but comcast has been blocking that port forquite a while now. I have been using comcast's mailserver as my sntpm outgoing mailserver on pport 587 during this time, and that works fine.