Brother HL-L2357DW Online User's Manual page 132

Port Number
If you select SSL, the Port value will be changed to match the protocol. To change the port number manually,
type the port number after you choose SSL/TLS.
You must configure your machine's SMTP communication method to match the method used by your email
server. For details about your email server settings, contact your network administrator or your ISP.
In most cases, the secured webmail services require the following settings:
SMTP Port
Server Authentication Method
SSL/TLS
Related Information
• Send an Email Securely
25
SMTP-AUTH
TLS
128