Secure SMTP (SSL/TLS) not working properly

[JMauclair]

Describe the bug
When activating SSL/TLS, mail send function is not working properly

[Error: 50520000:error:0A00010B:SSL routines:ssl3_get_record:wrong version number:c:\ws\deps\openssl\openssl\ssl\record\ssl3_record.c:355:
] {
  library: 'SSL routines',
  reason: 'wrong version number',
  code: 'ESOCKET',
  command: 'CONN'                                                                                                                                                                                                                   
}

To Reproduce
Steps to reproduce the behavior:

1. Go to '/admin/admin/manage/settings/email'
2. Fill the form for email settings and make sure to check SSL/TLS with port 587
3. Fill the test form
4. Click check connection and see the error

Expected behavior
Should send email properly

Additionnal info
Working properly without checking SSL/TLS option