# SECURE

> [HTML Version](secure.htm)

SECURE may optionally be used to specify the type of secure connection to establish with the SMTP server. The options are **TLS** (establish an SSL/TLS encrypted connection immediately, typically at port 465), **STARTTLS** (start with an unencrypted connection and then upgrade to TLS using the STARTTLS SMTP command), or **NONE** (unencrypted connection). If SECURE_ _is not specified, the option defaults to NONE. Note that changing the SECURE_ _option typically requires changing the port (see _server _above).

**See Also**

•	[SECUREHELLO](securehello.htm.md)

•	[EMAILX Adminicetera](emailxadminicetera.htm.md) (for related requirements)