SMTP Mail Protocol
This page provides information on the SMTP Mail Protocol detected by the Netify DPI engine. The protocol operates on TCP port 25, an officially registered port assigned by the IANA.
Protocol Description
The Simple Mail Transfer Protocol (SMTP) 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
- 3
- Full Name
- Simple Mail Transfer Protocol
- Abbreviation
- SMTP
- Category Tag
- Category
- Home Page
- SMTP Mail
- Introduced
- Version 2.88
Protocol Ports - RFC
- TCP 25
- Simple Mail Transfer
Best Practices
Keep an eye on the size and number of SMTP 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.