Change Social Links Icon

Site URL: https://www.jessleclerc.com/

I want to change the second link, a hyper-link icon, to an envelope icon since it is a mailto: link.

I tried a few different strategies with no success. 

The first option, I tried changing the icon itself to a different icon. The second approach, I uploaded FontAwesome into the CSS and tried targeting the icon this way. Example code:
 

.sqs-social-links .sqs-social-link a[href^="mailto:"]::before {
    content: '\f0e0'; /* Unicode for Mail icon */
    font-family: 'FontAwesome' !important;
    font-size: 24px;
    display: inline-block; 
    line-height: 1; 
}

My assumption might be because I am using the knock-out styling and not able to target it correctly.

Also just realized, the mailto:example@gmail.com doesn't actually work.. maybe I need a completely different solution for this :)

Ahh thank you! So simple, don't know how I missed that :) Appreciate it - cheers!