I'm sure this is a simple question but I've spent a long time Googleing to no end. I'm simply trying to send an email from commmand line in OpenSuse12.1 using a "default" mail program that is available on most standard linuxes. As I understand it 'mail' is that program, but that only returns 'command not found'. I've searched for mail in Yast but only came up with lots of third-party programs.
Sendmail and Postfix are Mail Transport Agents (MTAs), you want a mail user agent (MUA).
The package you are looking for is called
alpine instead. Additionally, if you want to send attachments using the command line,
mutt is a much better option.