If I have the full contents of a MIME message, what is the best utility on Linux to send the message? The MIME message would include the full headers and mail body, for example:
Received: (qmail 32389 invoked by uid 0); 13 Jun 2017 09:24:51 -0400 Date: Tue, 13 Jun 2017 09:24:51 -0400 From: email@example.com To: firstname.lastname@example.org Subject: Test Email Message-ID: <593fe7a3.IgSR+/BLy+NYXlVZemail@example.com> User-Agent: Heirloom mailx 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit The mail body goes here
I want to be able to feed the above to a command line utility which will then re-process the message exactly 'as is' without having to parse fields such as sender, subject, etc. It should send the message through a specified external SMTP server (not the local server's mail queue).
What command line utility can I use for this purpose?