Meteor Email Server with Self-Signed Certificate - email

Question

I am trying to have my meteor application send an e-mail using my own e-mail server.
I installed my e-mail's server certs onto my meteor app server by doing:
openssl s_client -connect my-email-server.com:443 <<<'' | openssl x509 -out /tmp/mycert
cp /tmp/mycert /usr/local/share/ca-certificates/
update-ca-certificates
Which appeared to install correctly (I also used dpkg-reconfigure ca-certificates to install the certs) (ref: 90607)
I then start my meteor app in the following ways, none of which work to successfully send my e-mail:
MAIL_URL=smtp://user:password#my-email-server.com:587 meteor
CAFILE="/tmp/mycert" MAIL_URL=smtp://user:password#my-email-server.com:587 meteor
The code I am calling in my application is:
Email.send({
to: emailAddress,
from: "user#my-email-server.com",
subject: "Example Email",
text: "The contents of our email in plain text.",
});
The error I am getting is:
I20180114-04:09:25.698(-5)? Exception while invoking method 'emailMethod' Error: unable to verify the first certificate
I20180114-04:09:25.698(-5)? at TLSSocket.<anonymous> (_tls_wrap.js:1103:38)
I20180114-04:09:25.698(-5)? at emitNone (events.js:106:13)
I20180114-04:09:25.699(-5)? at TLSSocket.emit (events.js:208:7)
I20180114-04:09:25.699(-5)? at TLSSocket._finishInit (_tls_wrap.js:637:8)
I20180114-04:09:25.699(-5)? at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:467:38)
Exception while invoking method 'emailMethodHere' Error: unable to verify the first certificate
When I run the meteor app via NODE_TLS_REJECT_UNAUTHORIZED=0 MAIL_URL=smtp://user:password#my-email-server.com:587 meteor then it works as expected (bypassing the cert entirely), so I know the trust/certificate is the issue. Where is my error? How do I tell meteor to trust the certificate that I have obtained via the openssl command above?
My related research before resorting to posting:
adding-a-self-signed-certificate-to-the-trusted-list
meteor add trusted certificate
error: self signed certificate in certificate chain
ssl-root-cas