SUBMISSIONS

SUBMISSIONS is a protocol used for securely submitting emails over SSL/TLS on port 465. It ensures that email communication between clients and servers is encrypted, providing a higher level of security. This service is commonly used by email clients to send outgoing mail securely.

What is SUBMISSIONS

SUBMISSIONS is a protocol designed for the secure submission of emails over SSL/TLS, operating on port 465. This service was initially introduced to provide a secure method for email clients to send outgoing mail, ensuring that the communication between the client and the server is encrypted. This encryption helps protect sensitive information from being intercepted by unauthorized parties.

The history of SUBMISSIONS dates back to the early days of email when security was a growing concern. The need for a secure submission protocol led to the adoption of port 465 for this purpose. Over time, it has become a standard practice for email clients to use this port for secure email submission, complementing other secure email protocols like IMAPS and POP3S.

Many email service providers support SUBMISSIONS to enhance the security of their email services. By using SSL/TLS encryption, SUBMISSIONS helps prevent common email security threats such as man-in-the-middle attacks and eavesdropping. This makes it an essential component of modern email security practices.

SUBMISSIONS runs on TCP port 465 and is official IANA port.

Security risk

If port 465 is open and the SUBMISSIONS service is running, it could be targeted by attackers attempting to exploit vulnerabilities in the email server software. Ensuring that the server is properly configured and up-to-date with security patches is crucial to mitigate these risks. Additionally, improper configuration could lead to unauthorized access or data leakage.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 465. Use StackChanges to monitor if the SUBMISSIONS port is closed and stays closed. StackChanges will send an alert if port 465 is open again.