Brother HL 2270DW - Manual (Page 38)

Security features
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7
SMTP settings
 You can change the SMTP port number using Web Based Management. This is useful if your ISP (Internet
Service Provider) implements the “Outbound Port 25 Blocking (OP25B)” service.
 By changing the SMTP port number to a specific number which your ISP is using for the SMTP server (for
example, port 587), you would then be able to send an E-mail via the SMTP server.
 If you can use both POP before SMTP and SMTP-AUTH, we recommend choosing SMTP-AUTH.
 If you choose POP before SMTP for the SMTP Server Authentication Method, you need to configure the
POP3 settings. You can also use the APOP method if needed.