Laravel error when sending custom email address using smtp server

I have a project that has a module that sends email from request. Im using beautymail package for the email template. I can send an email using a gmail account, but there is this email that I get from my client that has a custome email address in it. Like this xx.xxxxx@propnex.sg, they said that the email is a smtp server. So I tried configuring my .env and other configuration files in laravel. But I get this error upon sending Connection could not be established with host mail.propnex.sg :stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:1408F10B:SSL routines:ssl3_get_record:wrong version number Could someone tell me why Im getting this error and what should I do to get rid of this? Thanks a lot

.env config

MAIL_DRIVER=smtp
MAIL_HOST=mail.propnex.sg
MAIL_PORT=587
MAIL_USERNAME=xx.xxxxx@propnex.sg
MAIL_PASSWORD=xxxxxxxx
MAIL_ENCRYPTION=ssl

Mail.php

'from' => [
        'address' => 'xx.xxxxx@propnex.sg',
        'name' => 'Propnex',
    ],

    'reply_to' => ['address' => 'xx.xxxxx@propnex.sg', 'name' => 'Propnex'],

    'encryption' => env('MAIL_ENCRYPTION', 'tls'),


    'username' => env('MAIL_USERNAME'),

    'password' => env('MAIL_PASSWORD'),

    'port' => env('MAIL_PORT', 587),

    'driver' => env('MAIL_DRIVER', 'smtp'),

    'host' => env('MAIL_HOST', 'mail.propnex.sg'),