Secure SMTP Mail Protocol
This page provides information on the Secure SMTP Mail Protocol detected by the Netify DPI engine. The protocol operates on TCP port 465 and TCP port 587, both officially registered with the IANA.
Protocol Description
The Secure Simple Mail Transfer Protocol (SMTPS) is used for sending e-mail messages.
Please see the protocol catalog page for information on other protocols detected by Netify DPI.
Protocol Details
- ID
- 29
- Full Name
- Secure Simple Mail Transfer Protocol
- Abbreviation
- SMTPS
- Category Tag
- Category
- Home Page
- Secure SMTP Mail
- Introduced
- Version 2.88
Protocol Ports - RFC
- TCP 465
- Message Submission Over TLS Protocol
- TCP 587
- Message Submission
Best Practices
Keep an eye on the size and number of SMTPS connections going through your network. If you see a spike in traffic, it could be spam or virus traffic from a malware infected system on your network.
Related Protocols
Review the Mail category suite below, or explore the complete protocol catalog.