From: Eric Hodel <drbrain@...7.net>
Date: 2008-08-12T07:10:07+09:00
Subject: Re: gmail imap

On Aug 11, 2008, at 09:27 AM, Junkone wrote:
> how do i extract the message body using imap. i am hunting it and
> cannot seem to figure it out. probably i am not sure what the specific
> envelope attribute it should be. i tried envelope.body but it does not
> like it.
>
> imap = Net::IMAP.new('imap.gmail.com','993',true)
> imap.login(username, password)
> imap.select('INBOX')
>
>  imap.search(["NOT", "DELETED" ).each do |message_id|
>    envelope = imap.fetch(message_id, "ENVELOPE")[0].attr["ENVELOPE"]
>    puts "#{envelope.from[0].name}: \t#{envelope.subject}"
>   # imap.store(message_id, "+FLAGS", [:Deleted])
>  end
>
> imap.logout()
> imap.disconnect()

See RFC 3501 section 6.4.5.  You probably want BODY[] judging from  
your example code.