Attachments are a problem since they are added to mail body.
For subject, type 'Subject:' after DATA line

For pop servers:

telnet somepopserver 110
USER username
PASS password
STAT - reports how many messages and size in bytes
LIST - lists your mail + size in bytes
RETR n - retrieves mail number n (only prints it in telnet window, doesn't save it anywhere)
TOP x y - on some servers prints header for mail number x and prints y lines of message
DELE n - marks mail number n for deletion _but_ doesn't delete until you type QUIT
RSET - undoes DELE
QUIT - logs you off and deletes any messages marked for delete

I guess it wouldnt be too hard to write something like this in code, maybe even a bash script.

Hope this helps

Thank you very much.

By the way, I managed, with your advice, to send an HTML e-mail from Thunderbird using sendmail! It's not that hard. For some reason the guys at Thunderbird want to protect me from my own ignorance and make it insanely hard to configure different smtp servers for different accounts...until you know how. I wish they'd just let people configure their accounts like every other client does.

Do you happen to know how to tell sendmail to use a particular server in the helo handshake, instead of localhost or my IP? As usual, I'm googling all over for this but am finding amazingly complicated configuration instructions which don't quite seem applicable.

Thanks very much for all the help.

Not sure what you mean here - HELO or EHLO will always report your ip no matter what domain you pass to it. It will always pick up if you are localhost or not, and I've no idea if it's possible to spoof this. But if you just want to make the mail from line set to a specific user@domain then that works. Just change the Mail From: part.

If you mean to make sendmail relay to another smtp server instead of sending out itself, there are a couple of settings in sendmail.cf to do this:

SMART_HOST, smtp.someotherserver.com and
DS smtp.anotherserver.com

Hi.

I'm not sure what I mean myself. I really don't know a lot about how all this stuff works.

As I mentioned, I use a desktop server on Windows. A number of messages would always show error notices, such as "sender rejected", "service not available", and a couple of others. So I checked around in the documentation and found that there was a setting for helo, which let me name whatever server I wanted for the handshake, without actually using that server to send. So, instead of localhost, I typed mail.xyz.com (using the real server name of my host which matched the From: address). As mentioned, I can use that server anyway...just limited by their hourly allotment.

Most of the error messages stopped and messages were delivered.

Maybe, as you say, that's some kind of spoof.

So, as far as you know, sendmail can't do that?

Maybe, I haven't really looked into that too much to be honest. Might be interesting to try to log messages from thunderbird that it sends to an smtp server.

Ok, debates about whether or not you should run IE on Linux or not is crap.

If you want to use IE on Linux.

Go to WineHQ.org and download the appropriate package for your distribution or the source.

Install Wine

As your user, not root, run wine. This will build the basic directory structure and config initially.

From WineHQ.org, download Winetools and install it.

As your user, not root, run wt to start Winetools. Follow the basic instructions, which include installing IE 6 SP1 and it will work.

I believe you'll have to manually add a link to your desktop or start menu.

For exceptional details on this process, use the WineHQ wiki or google for Wine and Winetools.