The configuration of email services often involves specifying a particular port for message submission. Port 587 is frequently used for email submission, especially when utilizing a Mail Submission Agent (MSA). This port generally necessitates authentication, adding a layer of security to the transmission of email from a client to a mail server. Control panels designed for server management typically provide interfaces to configure this port and its associated settings.
Employing Port 587 with authentication helps prevent unauthorized email relaying and spam. Historically, Port 25 was commonly used for email submission, but its open nature made it susceptible to abuse. The transition to Port 587, along with the enforcement of authentication, has improved email security and reduced the spread of unsolicited messages. Control panels simplify the complex server configurations required to implement these security measures.
