Hello @DestinKS, were you aabel to get any progress on this?
I am a bit out of ideas to help you. If you are really stumped, maybe you can try uncommenting these lines here:
https://github.com/salesagility/SuiteCRM/blob/master/include/SugarPHPMailer.php#L457
https://github.com/salesagility/SuiteCRM/blob/master/include/SugarPHPMailer.php#L497-L502
This will put some more information in your logs to help yo troubleshoot.