static void *imap_sieve_smtp_start
(const struct sieve_script_env *senv, const char *return_path)
{
struct imap_sieve_context *isctx =
(struct imap_sieve_context *)senv->script_context;
return (void *)smtp_client_init
(isctx->isieve->lda_set, return_path);
}
int mail_send_rejection(struct mail_deliver_context *ctx, const char *recipient,
const char *reason)
{
struct mail *mail = ctx->src_mail;
struct istream *input;
struct smtp_client *smtp_client;
struct ostream *output;
const char *return_addr, *hdr;
const char *value, *msgid, *orig_msgid, *boundary, *error;
string_t *str;
int ret;
if (mail_get_first_header(mail, "Message-ID", &orig_msgid) < 0)
orig_msgid = NULL;
if (mail_get_first_header(mail, "Auto-Submitted", &value) > 0 &&
strcasecmp(value, "no") != 0) {
i_info("msgid=%s: Auto-submitted message discarded: %s",
orig_msgid == NULL ? "" : str_sanitize(orig_msgid, 80),
str_sanitize(reason, 512));
return 0;
}
return_addr = mail_deliver_get_return_address(ctx);
if (return_addr == NULL) {
i_info("msgid=%s: Return-Path missing, rejection reason: %s",
orig_msgid == NULL ? "" : str_sanitize(orig_msgid, 80),
str_sanitize(reason, 512));
return 0;
}
if (mailbox_get_settings(mail->box)->mail_debug) {
i_debug("Sending a rejection to %s: %s", recipient,
str_sanitize(reason, 512));
}
smtp_client = smtp_client_init(ctx->set, NULL);
smtp_client_add_rcpt(smtp_client, return_addr);
output = smtp_client_send(smtp_client);
msgid = mail_deliver_get_new_message_id(ctx);
boundary = t_strdup_printf("%s/%s", my_pid, ctx->set->hostname);
str = t_str_new(512);
str_printfa(str, "Message-ID: %s\r\n", msgid);
str_printfa(str, "Date: %s\r\n", message_date_create(ioloop_time));
str_printfa(str, "From: Mail Delivery Subsystem <%s>\r\n",
ctx->set->postmaster_address);
str_printfa(str, "To: <%s>\r\n", return_addr);
str_append(str, "MIME-Version: 1.0\r\n");
str_printfa(str, "Content-Type: "
"multipart/report; report-type=%s;\r\n"
"\tboundary=\"%s\"\r\n",
ctx->dsn ? "delivery-status" : "disposition-notification",
boundary);
str_append(str, "Subject: ");
var_expand(str, ctx->set->rejection_subject,
get_var_expand_table(mail, reason, recipient));
str_append(str, "\r\n");
str_append(str, "Auto-Submitted: auto-replied (rejected)\r\n");
str_append(str, "Precedence: bulk\r\n");
str_append(str, "\r\nThis is a MIME-encapsulated message\r\n\r\n");
/* human readable status report */
str_printfa(str, "--%s\r\n", boundary);
str_append(str, "Content-Type: text/plain; charset=utf-8\r\n");
str_append(str, "Content-Disposition: inline\r\n");
str_append(str, "Content-Transfer-Encoding: 8bit\r\n\r\n");
var_expand(str, ctx->set->rejection_reason,
get_var_expand_table(mail, reason, recipient));
str_append(str, "\r\n");
if (ctx->dsn) {
/* DSN status report: For LDA rejects. currently only used when
user is out of quota */
str_printfa(str, "--%s\r\n"
"Content-Type: message/delivery-status\r\n\r\n",
boundary);
str_printfa(str, "Reporting-MTA: dns; %s\r\n", ctx->set->hostname);
if (mail_get_first_header(mail, "Original-Recipient", &hdr) > 0)
str_printfa(str, "Original-Recipient: rfc822; %s\r\n", hdr);
str_printfa(str, "Final-Recipient: rfc822; %s\r\n", recipient);
str_append(str, "Action: failed\r\n");
str_printfa(str, "Status: %s\r\n", ctx->mailbox_full ? "5.2.2" : "5.2.0");
} else {
/* MDN status report: For Sieve "reject" */
str_printfa(str, "--%s\r\n"
"Content-Type: message/disposition-notification\r\n\r\n",
boundary);
str_printfa(str, "Reporting-UA: %s; Dovecot Mail Delivery Agent\r\n",
ctx->set->hostname);
if (mail_get_first_header(mail, "Original-Recipient", &hdr) > 0)
str_printfa(str, "Original-Recipient: rfc822; %s\r\n", hdr);
str_printfa(str, "Final-Recipient: rfc822; %s\r\n", recipient);
if (orig_msgid != NULL)
str_printfa(str, "Original-Message-ID: %s\r\n", orig_msgid);
str_append(str, "Disposition: "
"automatic-action/MDN-sent-automatically; deleted\r\n");
}
str_append(str, "\r\n");
/* original message's headers */
str_printfa(str, "--%s\r\nContent-Type: message/rfc822\r\n\r\n", boundary);
o_stream_nsend(output, str_data(str), str_len(str));
if (mail_get_hdr_stream(mail, NULL, &input) == 0) {
/* Note: If you add more headers, they need to be sorted.
We'll drop Content-Type because we're not including the message
body, and having a multipart Content-Type may confuse some
MIME parsers when they don't see the message boundaries. */
static const char *const exclude_headers[] = {
"Content-Type"
};
input = i_stream_create_header_filter(input,
HEADER_FILTER_EXCLUDE | HEADER_FILTER_NO_CR |
HEADER_FILTER_HIDE_BODY, exclude_headers,
N_ELEMENTS(exclude_headers),
*null_header_filter_callback, (void *)NULL);
ret = o_stream_send_istream(output, input);
i_stream_unref(&input);
i_assert(ret != 0);
}
str_truncate(str, 0);
str_printfa(str, "\r\n\r\n--%s--\r\n", boundary);
o_stream_nsend(output, str_data(str), str_len(str));
if ((ret = smtp_client_deinit(smtp_client, &error)) < 0) {
i_error("msgid=%s: Temporarily failed to send rejection: %s",
orig_msgid == NULL ? "" : str_sanitize(orig_msgid, 80),
str_sanitize(error, 512));
} else if (ret == 0) {
i_info("msgid=%s: Permanently failed to send rejection: %s",
orig_msgid == NULL ? "" : str_sanitize(orig_msgid, 80),
str_sanitize(error, 512));
}
return ret < 0 ? -1 : 0;
}
