Definition: In a computer system, "smtp" stands for "Simple Mail Transfer Protocol." Class.smtp.php is part of PHP (e.g., PHPMailer) used to send email messages from within an application's environment. This file contains functions for handling SMTP connections, sending emails, and processing incoming email attachments. It typically handles various protocols like POP3, IMAP, and SMTP, allowing different applications to communicate with each other over the internet. The file is designed to be part of a system called Class or "Class.smtp.php" may refer to specific applications that utilize this PHP function for sending emails.
closed bracket.
what should be said.