← Back to Glossary

SMTP

Simple Mail Transfer Protocol. The standard protocol for sending email messages between servers, operating on port 25 or 587 with optional TLS encryption.

Related Terms

HTTP HTTPS FTP SFTP SSH Telnet IMAP POP3 NTP SIP RDP SMB
Found this useful? Share it.
Keep going
Free coursesStructured, day-by-day tracks Free hacking labsPractice in your browser, no setup Attack SimulatorHands-on challenges in your browser
Make it count. Join free to earn XP for what you read and solve, keep a streak, and track your progress.
Join free