xxfi_envfrom callback Function

Purpose

The xxfi_envfrom callback function handles the MAIL (envelope sender) command.

#include <libmilter/mfapi.h>
sfsistat (*xxfi_envfrom)(
	SMFICTX *ctx,
	char **argv
);

The xxfi_envfrom callback function is called when the client uses the DATA command and returns the SMFIS_CONTINUE flag.

Note: For more details on ESMTP responses, see RFC 1869.

Table 1. Arguments
Item	Description
ctx	The opaque context structure is maintained in the libmilter parameter.
argv	The null-terminated SMTP command arguments; `argv[0]` is guaranteed to be the sender address. Later arguments are the extended simple mail transfer protocol (ESMTP) arguments.

Table 2. Return Values
Item	Description
`SMFIS_TEMPFAIL`	The sender and the message are rejected with a temporary error; a new sender (and hence a new message) might later be specified and the xxfi_abort callback function is not called.
`SMFIS_REJECT`	The sender and the message are rejected; a new sender and message might be specified and the xxfi_abort callback function is not called.
`SMFIS_DISCARD`	The message is accepted and discarded, and the xxfi_abort callback function is not called.
`SMFIS_ACCEPT`	The message is accepted and the xxfi_abort callback function is not called.