> For the complete documentation index, see [llms.txt](https://ret2basic.gitbook.io/ctfnote/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ret2basic.gitbook.io/ctfnote/red-teaming/enumeration/service-enumeration/smtp-port-25.md).

# SMTP (Port 25)

## What is SMTP?

## Reference

{% embed url="<https://book.hacktricks.xyz/pentesting/pentesting-smtp>" %}
Pentesting SMTP/s - HackTricks
{% endembed %}