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IMPORTANT
SNS 3.x versions have reached End of Maintenance since July 1st, 2024.
We recommend that you update your SNS firewalls to a version with maintenance to guarantee the protection of your infrastructure.

# SMTP

The aim of the SMTP protocol is to detect connection between a client and an e-mail server or between two e-mail servers using SMTP. It allows sending e-mails and is used by SEISMO to detect the version of the client and/or e-mail server in order to report possible vulnerabilities.