Configuring a Custom SMTP Server 1. Go to Control Panel > System > Notification > Email > SMTP Server. 2. Under Select an e-mail account, select Custom. 3. Specify the following information. Field User Actions SMTP Server Specify an SMTP server name such as smtp.gmail.com. Port Number Specify the port number for the SMTP server. E-mail Specify the email address that will receive QES notifications. Username Specify a username that contains a maximum of 128 characters. This field is optional. Password Specify a password that contains a maximum of 128 characters. This field is optional. Select one of the following options. Secure connection o SSL: Use SSL to secure the connection. o TLS: Use TSL to secure the connection. o None: Do not use a secure connection. Tip: QNAP recommends enabling a secure connection if the SMTP server supports it. Select one of the following SMTP authentication options. Authentication o None o LOGIN o PLAIN o CRAM-MD5