TLS Error with Interfax via Netlify Functions in Production Only

[preconception]

Production Error Only

Delivery Error { Error: socket hang up
at TLSSocket.onHangUp (_tls_wrap.js:1137:19)
at Object.onceWrapper (events.js:313:30)
at emitNone (events.js:111:20)
at TLSSocket.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1064:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickDomainCallback (internal/process/next_tick.js:218:9)
code: ‘ECONNRESET’,
path: null,
host: ‘rest.interfax.net’,
port: 443,
localAddress: undefined }

Netlify's Certificate is not working with interfax

I got this message from an interfax employee regarding the issue:

Hello Sean,

Based upon the error, it seems to be related to the TLS and the possibly the cipher’s attempting to be used by your application. For a list of cipher’s our endpoint supports, please reference the image below and/or the following link: https://www.ssllabs.com/ssltest/analyze.html?d=rest.interfax.net&latest

​

Thank you,

Anthony Cox
Technical Support Engineer, Client Services

[preconception]

Sends perfectly fine when using netlify-lambda locally.