Specifies an event type signalled for SMTP commands with no parameters.

TBasicHandler = procedure (ASender: TIdCommand) of object;

TBasicHandler specifies an event type signalled when SMTP commands requiring no parameter data are received and executed for the client connection.

TBasicHandler is the type used to represent the TIdSMTPServer command event handlers for OnCommandHELP, OnCommandSOML, OnCommandSEND, OnCommandSAML, OnCommandVRFY, OnCommandEXPN, and OnCommandTURN.