How can I send emails from the command line with recipient tab-completion and proper file attachment?

A year ago I tried a couple of different email senders because I wanted to simplify sending emails from the command line. There are a couple of tools for it, I tried (I don't remember exactly):

• sendmail
• mail
• xmail
• ssmtp
• uuencode
• some mime scripts I found on the web using mail, that handle attachments.
• echo body text | mutt -s subject -a /etc/resolv.conf [other files] -- [email protected]

The issue of attaching a file was difficult, due to

• encoding issues
• mime types for binary files
• attaching multiple files failed (no clear boundaries between them)
• send text files as attachment, not in email body

but eventually it worked with mutt (with the command above). I would have preferred a method without the invocation of a big program, but I was fine with it.

At some point I stopped using it, because I always had to enter the email addresses by hand and I never remember them.

In order further facilitate command line sending,

is there an easy way to enable tab-completion for email addresses?

I guess there is some manual work involved, because I didn't find anything on the web. Building an email index (exported cvs from gmail) seems easy, but what if John Jerry uses [email protected] as his email address? It would be necessary to complete

• Jo<tab>
• Je<tab>
• ex<tab> and
• jj<tab>.

This must be somehow fed into the readline utility - I don't know if that's difficult, but I'm looking for an easy way, if there is one!