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mb = (struct mailimf_mailbox*)clist_content(clist_begin(fld_from->frm_mb_list->mb_list));
if (mb==NULL) {
goto cleanup;
}
from_addr_norm = dc_addr_normalize(mb->mb_addr_spec);
/* get To:/Cc: and check there is exactly one recipent */
recipients = mailimf_get_recipients(mimeparser->header_root);
if (dc_hash_cnt(recipients)!=1) {
goto cleanup;
}
/* check if From:==To:/Cc: */
if (dc_hash_find_str(recipients, from_addr_norm)) {
sender_equals_recipient = 1;
}
cleanup:
dc_hash_clear(recipients);
free(recipients);
free(from_addr_norm);
return sender_equals_recipient;
}
```
Filename: dc_move.c
```c
#include "dc_context.h"
#include "dc_mimeparser.h"
#include "dc_job.h"
void dc_do_heuristics_moves(dc_context_t* context, const char* folder, uint32_t msg_id)
{
// for already seen messages, folder may be different from msg->folder
dc_msg_t* msg = NULL;
sqlite3_stmt* stmt = NULL;
if (dc_sqlite3_get_config_int(context->sql, "mvbox_move", DC_MVBOX_MOVE_DEFAULT)==0) {
goto cleanup;
}
if (!dc_is_inbox(context, folder) && !dc_is_sentbox(context, folder)) {
goto cleanup;
}
msg = dc_msg_new_load(context, msg_id);
if (dc_msg_is_setupmessage(msg)) {
// do not move setup messages;
// there may be a non-delta device that wants to handle it
goto cleanup;
}
if (dc_is_mvbox(context, folder)) {
dc_update_msg_move_state(context, msg->rfc724_mid, DC_MOVE_STATE_STAY);
goto cleanup;
}
if (msg->is_dc_message /*1=dc message, 2=reply to dc message*/) {
dc_job_add(context, DC_JOB_MOVE_MSG, msg->id, NULL, 0);
dc_update_msg_move_state(context, msg->rfc724_mid, DC_MOVE_STATE_MOVING);
}
cleanup:
sqlite3_finalize(stmt);
dc_msg_unref(msg);
}
```
Filename: dc_msg.c
```c
#include "dc_context.h"
#include "dc_imap.h"
#include "dc_smtp.h"
#include "dc_job.h"
#include "dc_pgp.h"
#include "dc_mimefactory.h"
#define DC_MSG_MAGIC 0x11561156
/**
* Create new message object. Message objects are needed eg. for sending messages using
* dc_send_msg(). Moreover, they are returned eg. from dc_get_msg(),
* set up with the current state of a message. The message object is not updated;
* to achieve this, you have to recreate it.
*
* @memberof dc_msg_t
* @param context The context that should be stored in the message object.
* @param viewtype The type to the message object to create,
* one of the @ref DC_MSG constants.
* @return The created message object.
*/