src/send_message.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2009 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <gtk/gtk.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <signal.h>
  32 #include <sys/types.h>
  33 #ifndef G_OS_WIN32
  34 #include <sys/wait.h>
  35 #endif
  36
  37 #include "send_message.h"
  38 #include "session.h"
  39 #include "ssl.h"
  40 #include "smtp.h"
  41 #include "prefs_common.h"
  42 #include "prefs_account.h"
  43 #include "procheader.h"
  44 #include "account.h"
  45 #include "progressdialog.h"
  46 #include "statusbar.h"
  47 #include "inputdialog.h"
  48 #include "alertpanel.h"
  49 #include "manage_window.h"
  50 #include "socket.h"
  51 #include "utils.h"
  52 #include "gtkutils.h"
  53 #include "inc.h"
  54 #include "log.h"
  55
  56 typedef struct _SendProgressDialog      SendProgressDialog;
  57
  58 struct _SendProgressDialog
  59 {
  60         ProgressDialog *dialog;
  61         Session *session;
  62         gboolean cancelled;
  63 };
  64
  65 static gint send_recv_message           (Session                *session,
  66                                          const gchar            *msg,
  67                                          gpointer                data);
  68 static gint send_send_data_progressive  (Session                *session,
  69                                          guint                   cur_len,
  70                                          guint                   total_len,
  71                                          gpointer                data);
  72 static gint send_send_data_finished     (Session                *session,
  73                                          guint                   len,
  74                                          gpointer                data);
  75
  76 static SendProgressDialog *send_progress_dialog_create(void);
  77 static void send_progress_dialog_destroy(SendProgressDialog *dialog);
  78
  79 static void send_cancel_button_cb       (GtkWidget      *widget,
  80                                          gpointer        data);
  81
  82 static void send_put_error              (Session        *session);
  83
  84
  85 gint send_message(const gchar *file, PrefsAccount *ac_prefs, GSList *to_list)
  86 {
  87         FILE *fp;
  88         gint val;
  89
  90         cm_return_val_if_fail(file != NULL, -1);
  91         cm_return_val_if_fail(ac_prefs != NULL, -1);
  92         cm_return_val_if_fail(to_list != NULL, -1);
  93
  94         if ((fp = g_fopen(file, "rb")) == NULL) {
  95                 FILE_OP_ERROR(file, "fopen");
  96                 return -1;
  97         }
  98
  99         inc_lock();
 100         if (ac_prefs->use_mail_command && ac_prefs->mail_command &&
 101             (*ac_prefs->mail_command)) {
 102                 val = send_message_local(ac_prefs->mail_command, fp);
 103                 fclose(fp);
 104                 inc_unlock();
 105                 return val;
 106         } else {
 107                 val = send_message_smtp(ac_prefs, to_list, fp);
 108
 109                 fclose(fp);
 110                 inc_unlock();
 111                 return val;
 112         }
 113 }
 114
 115 enum
 116 {
 117         Q_SENDER     = 0,
 118         Q_SMTPSERVER = 1,
 119         Q_RECIPIENTS = 2,
 120         Q_ACCOUNT_ID = 3
 121 };
 122
 123 gint send_message_local(const gchar *command, FILE *fp)
 124 {
 125         gchar **argv;
 126         GPid pid;
 127         gint child_stdin;
 128         gchar buf[BUFFSIZE];
 129         gboolean err = FALSE;
 130         gint status;
 131
 132         cm_return_val_if_fail(command != NULL, -1);
 133         cm_return_val_if_fail(fp != NULL, -1);
 134
 135         log_message(LOG_PROTOCOL, _("Sending message using command: %s\n"), command);
 136
 137         argv = strsplit_with_quote(command, " ", 0);
 138
 139         if (g_spawn_async_with_pipes(NULL, argv, NULL,
 140 #ifdef G_OS_WIN32
 141                                      0,
 142 #else
 143                                      G_SPAWN_DO_NOT_REAP_CHILD,
 144 #endif
 145                                      NULL, NULL,
 146                                      &pid, &child_stdin, NULL, NULL,
 147                                      NULL) == FALSE) {
 148                 g_snprintf(buf, sizeof(buf),
 149                            _("Couldn't execute command: %s"), command);
 150                 log_warning(LOG_PROTOCOL, "%s\n", buf);
 151                 alertpanel_error("%s", buf);
 152                 g_strfreev(argv);
 153                 return -1;
 154         }
 155         g_strfreev(argv);
 156
 157         while (fgets(buf, sizeof(buf), fp) != NULL) {
 158                 strretchomp(buf);
 159                 if (buf[0] == '.' && buf[1] == '\0') {
 160                         if (fd_write_all(child_stdin, ".", 1) < 0) {
 161                                 err = TRUE;
 162                                 break;
 163                         }
 164                 }
 165                 if (fd_write_all(child_stdin, buf, strlen(buf)) < 0 ||
 166                     fd_write_all(child_stdin, "\n", 1) < 0) {
 167                         err = TRUE;
 168                         break;
 169                 }
 170         }
 171
 172         fd_close(child_stdin);
 173
 174 #ifndef G_OS_WIN32
 175         waitpid(pid, &status, 0);
 176         if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
 177                 err = TRUE;
 178 #endif
 179
 180         g_spawn_close_pid(pid);
 181
 182         if (err) {
 183                 g_snprintf(buf, sizeof(buf),
 184                            _("Error occurred while executing command: %s"),
 185                            command);
 186                 log_warning(LOG_PROTOCOL, "%s\n", buf);
 187                 alertpanel_error("%s", buf);
 188                 return -1;
 189         }
 190
 191         return 0;
 192 }
 193
 194 gint send_message_smtp_full(PrefsAccount *ac_prefs, GSList *to_list, FILE *fp, gboolean keep_session)
 195 {
 196         Session *session;
 197         SMTPSession *smtp_session;
 198         gushort port = 0;
 199         SendProgressDialog *dialog;
 200         gchar buf[BUFFSIZE];
 201         gint ret = 0;
 202         gboolean was_inited = FALSE;
 203         MsgInfo *tmp_msginfo = NULL;
 204         MsgFlags flags = {0, 0};
 205         long fp_pos = 0;
 206         gchar spec_from[BUFFSIZE];
 207
 208         cm_return_val_if_fail(ac_prefs != NULL, -1);
 209         cm_return_val_if_fail(ac_prefs->address != NULL, -1);
 210         cm_return_val_if_fail(ac_prefs->smtp_server != NULL, -1);
 211         cm_return_val_if_fail(to_list != NULL, -1);
 212         cm_return_val_if_fail(fp != NULL, -1);
 213
 214         /* get the From address used, not necessarily the ac_prefs',
 215          * because it's editable. */
 216
 217         fp_pos = ftell(fp);
 218         tmp_msginfo = procheader_parse_stream(fp, flags, FALSE, FALSE);
 219         fseek(fp, fp_pos, SEEK_SET);
 220
 221         if (tmp_msginfo && tmp_msginfo->from) {
 222                 strncpy2(spec_from, tmp_msginfo->from, BUFFSIZE-1);
 223                 extract_address(spec_from);
 224         } else {
 225                 strncpy2(spec_from, ac_prefs->address, BUFFSIZE-1);
 226         }
 227         if (tmp_msginfo) {
 228                 procmsg_msginfo_free(tmp_msginfo);
 229         }
 230
 231         if (!ac_prefs->session) {
 232                 /* we can't reuse a previously initialised session */
 233                 session = smtp_session_new(ac_prefs);
 234                 smtp_session = SMTP_SESSION(session);
 235
 236                 if (ac_prefs->set_domain && ac_prefs->domain && strlen(ac_prefs->domain)) {
 237                         smtp_session->hostname = g_strdup(ac_prefs->domain);
 238                 } else {
 239                         smtp_session->hostname = NULL;
 240                 }
 241
 242                 if (ac_prefs->use_smtp_auth) {
 243                         smtp_session->forced_auth_type = ac_prefs->smtp_auth_type;
 244                         if (ac_prefs->smtp_userid && strlen(ac_prefs->smtp_userid)) {
 245                                 smtp_session->user = g_strdup(ac_prefs->smtp_userid);
 246                                 if (ac_prefs->smtp_passwd)
 247                                         smtp_session->pass =
 248                                                 g_strdup(ac_prefs->smtp_passwd);
 249                                 else {
 250                                         smtp_session->pass =
 251                                                 input_dialog_query_password_keep
 252                                                         (ac_prefs->smtp_server,
 253                                                          smtp_session->user,
 254                                                          &(ac_prefs->session_smtp_passwd));
 255                                         if (!smtp_session->pass) {
 256                                                 session_destroy(session);
 257                                                 return -1;
 258                                         }
 259                                 }
 260                         } else {
 261                                 smtp_session->user = g_strdup(ac_prefs->userid);
 262                                 if (ac_prefs->passwd)
 263                                         smtp_session->pass = g_strdup(ac_prefs->passwd);
 264                                 else {
 265                                         smtp_session->pass =
 266                                                 input_dialog_query_password_keep
 267                                                         (ac_prefs->smtp_server,
 268                                                          smtp_session->user,
 269                                                          &(ac_prefs->session_smtp_passwd));
 270                                         if (!smtp_session->pass) {
 271                                                 session_destroy(session);
 272                                                 return -1;
 273                                         }
 274                                 }
 275                         }
 276                 } else {
 277                         smtp_session->user = NULL;
 278                         smtp_session->pass = NULL;
 279                 }
 280
 281 #ifdef USE_GNUTLS
 282                 port = ac_prefs->set_smtpport ? ac_prefs->smtpport :
 283                         ac_prefs->ssl_smtp == SSL_TUNNEL ? SSMTP_PORT : SMTP_PORT;
 284                 session->ssl_type = ac_prefs->ssl_smtp;
 285                 if (ac_prefs->ssl_smtp != SSL_NONE)
 286                         session->nonblocking = ac_prefs->use_nonblocking_ssl;
 287 #else
 288                 if (ac_prefs->ssl_smtp != SSL_NONE) {
 289                         if (alertpanel_full(_("Insecure connection"),
 290                                 _("This connection is configured to be secured "
 291                                   "using SSL, but SSL is not available in this "
 292                                   "build of Claws Mail. \n\n"
 293                                   "Do you want to continue connecting to this "
 294                                   "server? The communication would not be "
 295                                   "secure."),
 296                                   GTK_STOCK_CANCEL, _("Con_tinue connecting"),
 297                                   NULL, FALSE, NULL, ALERT_WARNING,
 298                                   G_ALERTDEFAULT) != G_ALERTALTERNATE) {
 299                                 session_destroy(session);
 300                                 return -1;
 301                         }
 302                 }
 303                 port = ac_prefs->set_smtpport ? ac_prefs->smtpport : SMTP_PORT;
 304 #endif
 305
 306                 dialog = send_progress_dialog_create();
 307                 dialog->session = session;
 308                 smtp_session->dialog = dialog;
 309
 310                 progress_dialog_list_set(dialog->dialog, 0, NULL,
 311                                          ac_prefs->smtp_server,
 312                                          _("Connecting"));
 313
 314                 if (ac_prefs->pop_before_smtp
 315                     && (ac_prefs->protocol == A_APOP || ac_prefs->protocol == A_POP3)
 316                     && (time(NULL) - ac_prefs->last_pop_login_time) > (60 * ac_prefs->pop_before_smtp_timeout)) {
 317                         g_snprintf(buf, sizeof(buf), _("Doing POP before SMTP..."));
 318                         log_message(LOG_PROTOCOL, "%s\n", buf);
 319                         progress_dialog_set_label(dialog->dialog, buf);
 320                         progress_dialog_list_set_status(dialog->dialog, 0, _("POP before SMTP"));
 321                         GTK_EVENTS_FLUSH();
 322                         inc_pop_before_smtp(ac_prefs);
 323                 }
 324
 325                 g_snprintf(buf, sizeof(buf), _("Connecting to SMTP server: %s ..."),
 326                            ac_prefs->smtp_server);
 327                 progress_dialog_set_label(dialog->dialog, buf);
 328                 log_message(LOG_PROTOCOL, "%s\n", buf);
 329
 330                 session_set_recv_message_notify(session, send_recv_message, dialog);
 331                 session_set_send_data_progressive_notify
 332                         (session, send_send_data_progressive, dialog);
 333                 session_set_send_data_notify(session, send_send_data_finished, dialog);
 334
 335         } else {
 336                 /* everything is ready to start at MAIL FROM:, just
 337                  * reinit useful variables.
 338                  */
 339                 session = SESSION(ac_prefs->session);
 340                 ac_prefs->session = NULL;
 341                 smtp_session = SMTP_SESSION(session);
 342                 smtp_session->state = SMTP_HELO;
 343                 dialog = (SendProgressDialog *)smtp_session->dialog;
 344                 was_inited = TRUE;
 345         }
 346
 347         /* This has to be initialised for every mail sent */
 348         smtp_session->from = g_strdup(spec_from);
 349         smtp_session->to_list = to_list;
 350         smtp_session->cur_to = to_list;
 351         smtp_session->send_data = (guchar *)get_outgoing_rfc2822_str(fp);
 352         smtp_session->send_data_len = strlen((gchar *)smtp_session->send_data);
 353
 354         session_set_timeout(session,
 355                             prefs_common.io_timeout_secs * 1000);
 356         /* connect if necessary */
 357         if (!was_inited && session_connect(session, ac_prefs->smtp_server, port) < 0) {
 358                 session_destroy(session);
 359                 send_progress_dialog_destroy(dialog);
 360                 ac_prefs->session = NULL;
 361                 return -1;
 362         }
 363
 364         debug_print("send_message_smtp(): begin event loop\n");
 365
 366         if (was_inited) {
 367                 /* as the server is quiet, start sending ourselves */
 368                 smtp_from(smtp_session);
 369         }
 370
 371         while (session_is_connected(session) && dialog->cancelled == FALSE
 372                 && SMTP_SESSION(session)->state != SMTP_MAIL_SENT_OK)
 373                 gtk_main_iteration();
 374
 375         if (SMTP_SESSION(session)->error_val == SM_AUTHFAIL) {
 376                 if (ac_prefs->session_smtp_passwd) {
 377                         g_free(ac_prefs->session_smtp_passwd);
 378                         ac_prefs->session_smtp_passwd = NULL;
 379                 }
 380                 ret = -1;
 381         } else if (SMTP_SESSION(session)->state == SMTP_MAIL_SENT_OK) {
 382                 log_message(LOG_PROTOCOL, "%s\n", _("Mail sent successfully."));
 383                 ret = 0;
 384         } else if (session->state == SESSION_EOF &&
 385                    SMTP_SESSION(session)->state == SMTP_QUIT) {
 386                 /* consider EOF right after QUIT successful */
 387                 log_warning(LOG_PROTOCOL, "%s\n", _("Connection closed by the remote host."));
 388                 ret = 0;
 389         } else if (session->state == SESSION_ERROR ||
 390                    session->state == SESSION_EOF ||
 391                    session->state == SESSION_TIMEOUT ||
 392                    SMTP_SESSION(session)->state == SMTP_ERROR ||
 393                    SMTP_SESSION(session)->error_val != SM_OK)
 394                 ret = -1;
 395         else if (dialog->cancelled == TRUE)
 396                 ret = -1;
 397
 398         if (ret == -1) {
 399                 manage_window_focus_in(dialog->dialog->window, NULL, NULL);
 400                 send_put_error(session);
 401                 manage_window_focus_out(dialog->dialog->window, NULL, NULL);
 402         }
 403
 404         /* if we should close the connection, let's do it.
 405          * Close it in case of error, too, as it helps reinitializing things
 406          * easier.
 407          */
 408         if (!keep_session || ret != 0) {
 409                 if (session_is_connected(session))
 410                         smtp_quit(smtp_session);
 411                 while (session_is_connected(session) && !dialog->cancelled)
 412                         gtk_main_iteration();
 413                 session_destroy(session);
 414                 ac_prefs->session = NULL;
 415                 send_progress_dialog_destroy(dialog);
 416         } else {
 417                 g_free(smtp_session->from);
 418                 g_free(smtp_session->send_data);
 419                 g_free(smtp_session->error_msg);
 420         }
 421         if (keep_session && ret == 0 && ac_prefs->session == NULL)
 422                 ac_prefs->session = SMTP_SESSION(session);
 423
 424
 425         statuswindow_pop_all();
 426         statusbar_verbosity_set(FALSE);
 427         return ret;
 428 }
 429
 430 gint send_message_smtp(PrefsAccount *ac_prefs, GSList *to_list, FILE *fp)
 431 {
 432         return send_message_smtp_full(ac_prefs, to_list, fp, FALSE);
 433 }
 434
 435 static gint send_recv_message(Session *session, const gchar *msg, gpointer data)
 436 {
 437         gchar buf[BUFFSIZE];
 438         SMTPSession *smtp_session = SMTP_SESSION(session);
 439         SendProgressDialog *dialog = (SendProgressDialog *)data;
 440         gchar *state_str = NULL;
 441
 442         cm_return_val_if_fail(dialog != NULL, -1);
 443
 444         switch (smtp_session->state) {
 445         case SMTP_READY:
 446         case SMTP_CONNECTED:
 447                 return 0;
 448         case SMTP_HELO:
 449                 g_snprintf(buf, sizeof(buf), _("Sending HELO..."));
 450                 state_str = _("Authenticating");
 451                 statuswindow_print_all(_("Sending message..."));
 452                 break;
 453         case SMTP_EHLO:
 454                 g_snprintf(buf, sizeof(buf), _("Sending EHLO..."));
 455                 state_str = _("Authenticating");
 456                 statuswindow_print_all(_("Sending message..."));
 457                 break;
 458         case SMTP_AUTH:
 459                 g_snprintf(buf, sizeof(buf), _("Authenticating..."));
 460                 state_str = _("Authenticating");
 461                 break;
 462         case SMTP_FROM:
 463                 g_snprintf(buf, sizeof(buf), _("Sending MAIL FROM..."));
 464                 state_str = _("Sending");
 465                 break;
 466         case SMTP_RCPT:
 467                 g_snprintf(buf, sizeof(buf), _("Sending RCPT TO..."));
 468                 state_str = _("Sending");
 469                 break;
 470         case SMTP_DATA:
 471         case SMTP_EOM:
 472                 g_snprintf(buf, sizeof(buf), _("Sending DATA..."));
 473                 state_str = _("Sending");
 474                 break;
 475         case SMTP_QUIT:
 476                 g_snprintf(buf, sizeof(buf), _("Quitting..."));
 477                 state_str = _("Quitting");
 478                 break;
 479         case SMTP_ERROR:
 480                 g_warning("send: error: %s\n", msg);
 481                 return 0;
 482         default:
 483                 return 0;
 484         }
 485
 486         progress_dialog_set_label(dialog->dialog, buf);
 487         progress_dialog_list_set_status(dialog->dialog, 0, state_str);
 488
 489         return 0;
 490 }
 491
 492 static gint send_send_data_progressive(Session *session, guint cur_len,
 493                                        guint total_len, gpointer data)
 494 {
 495         gchar buf[BUFFSIZE];
 496         SendProgressDialog *dialog = (SendProgressDialog *)data;
 497         MainWindow *mainwin = mainwindow_get_mainwindow();
 498
 499         cm_return_val_if_fail(dialog != NULL, -1);
 500
 501         if (SMTP_SESSION(session)->state != SMTP_SEND_DATA &&
 502             SMTP_SESSION(session)->state != SMTP_EOM)
 503                 return 0;
 504
 505         g_snprintf(buf, sizeof(buf), _("Sending message (%d / %d bytes)"),
 506                    cur_len, total_len);
 507         progress_dialog_set_label(dialog->dialog, buf);
 508         progress_dialog_set_fraction
 509                 (dialog->dialog, (total_len == 0) ? 0 : (gfloat)cur_len / (gfloat)total_len);
 510
 511         if (mainwin) {
 512                 if (!gtkut_widget_get_visible(mainwin->progressbar))
 513                         gtk_widget_show(mainwin->progressbar);
 514                 gtk_progress_bar_set_fraction
 515                         (GTK_PROGRESS_BAR(mainwin->progressbar),
 516                          (total_len == 0) ? 0 : (gfloat)cur_len / (gfloat)total_len);
 517         }
 518
 519         return 0;
 520 }
 521
 522 static gint send_send_data_finished(Session *session, guint len, gpointer data)
 523 {
 524         SendProgressDialog *dialog = (SendProgressDialog *)data;
 525         MainWindow *mainwin = mainwindow_get_mainwindow();
 526
 527         cm_return_val_if_fail(dialog != NULL, -1);
 528
 529         send_send_data_progressive(session, len, len, dialog);
 530         if (mainwin) {
 531                 gtk_widget_hide(mainwin->progressbar);
 532                 gtk_progress_bar_set_fraction
 533                         (GTK_PROGRESS_BAR(mainwin->progressbar),(gfloat)0);
 534         }
 535
 536         return 0;
 537 }
 538
 539 static void send_progress_dialog_size_allocate_cb(GtkWidget *widget,
 540                                          GtkAllocation *allocation)
 541 {
 542         cm_return_if_fail(allocation != NULL);
 543
 544         prefs_common.sendwin_width = allocation->width;
 545         prefs_common.sendwin_height = allocation->height;
 546 }
 547
 548 static SendProgressDialog *send_progress_dialog_create(void)
 549 {
 550         SendProgressDialog *dialog;
 551         ProgressDialog *progress;
 552         static GdkGeometry geometry;
 553
 554         dialog = g_new0(SendProgressDialog, 1);
 555
 556         progress = progress_dialog_create();
 557         gtk_window_set_title(GTK_WINDOW(progress->window),
 558                              _("Sending message"));
 559         g_signal_connect(G_OBJECT(progress->cancel_btn), "clicked",
 560                          G_CALLBACK(send_cancel_button_cb), dialog);
 561         g_signal_connect(G_OBJECT(progress->window), "delete_event",
 562                          G_CALLBACK(gtk_true), NULL);
 563         gtk_window_set_modal(GTK_WINDOW(progress->window), TRUE);
 564         g_signal_connect(G_OBJECT(progress->window), "size_allocate",
 565                          G_CALLBACK(send_progress_dialog_size_allocate_cb), NULL);
 566         manage_window_set_transient(GTK_WINDOW(progress->window));
 567
 568         progress_dialog_get_fraction(progress);
 569
 570         if (!geometry.min_height) {
 571                 geometry.min_width = 460;
 572                 geometry.min_height = 250;
 573         }
 574
 575         gtk_window_set_geometry_hints(GTK_WINDOW(progress->window), NULL, &geometry,
 576                                       GDK_HINT_MIN_SIZE);
 577         gtk_widget_set_size_request(progress->window, prefs_common.sendwin_width,
 578                                     prefs_common.sendwin_height);
 579
 580         if (!prefs_common.send_dialog_invisible) {
 581                 gtk_widget_show_now(progress->window);
 582         }
 583
 584         dialog->dialog = progress;
 585
 586         return dialog;
 587 }
 588
 589 static void send_progress_dialog_destroy(SendProgressDialog *dialog)
 590 {
 591         cm_return_if_fail(dialog != NULL);
 592         if (!prefs_common.send_dialog_invisible) {
 593                 progress_dialog_destroy(dialog->dialog);
 594         }
 595         g_free(dialog);
 596 }
 597
 598 static void send_cancel_button_cb(GtkWidget *widget, gpointer data)
 599 {
 600         SendProgressDialog *dialog = (SendProgressDialog *)data;
 601         statusbar_progress_all(0,0,0);
 602
 603         dialog->cancelled = TRUE;
 604 }
 605
 606 static void send_put_error(Session *session)
 607 {
 608         gchar *msg;
 609         gchar *log_msg = NULL;
 610         gchar *err_msg = NULL;
 611
 612         msg = SMTP_SESSION(session)->error_msg;
 613
 614         switch (SMTP_SESSION(session)->error_val) {
 615         case SM_ERROR:
 616         case SM_UNRECOVERABLE:
 617                 log_msg = _("Error occurred while sending the message.");
 618                 if (msg)
 619                         err_msg = g_strdup_printf
 620                                 (_("Error occurred while sending the message:\n%s"),
 621                                  msg);
 622                 else
 623                         err_msg = g_strdup(log_msg);
 624                 break;
 625         case SM_AUTHFAIL:
 626                 log_msg = _("Authentication failed.");
 627                 if (msg)
 628                         err_msg = g_strdup_printf
 629                                 (_("Authentication failed:\n%s"), msg);
 630                 else
 631                         err_msg = g_strdup(log_msg);
 632                 break;
 633         default:
 634                 switch (session->state) {
 635                 case SESSION_ERROR:
 636                         log_msg =
 637                                 _("Error occurred while sending the message.");
 638                         err_msg = g_strdup(log_msg);
 639                         break;
 640                 case SESSION_EOF:
 641                         log_msg = _("Connection closed by the remote host.");
 642                         err_msg = g_strdup(log_msg);
 643                         break;
 644                 case SESSION_TIMEOUT:
 645                         log_msg = _("Session timed out. You may be able to "
 646                                     "recover by increasing the timeout value in "
 647                                     "Preferences/Other/Miscellaneous.");
 648                         err_msg = g_strdup(log_msg);
 649                         break;
 650                 default:
 651                         break;
 652                 }
 653                 break;
 654         }
 655
 656         if (err_msg) {
 657                 log_error(LOG_PROTOCOL, "%s\n", err_msg);
 658                 g_free(err_msg);
 659         } else {
 660                 if (log_msg)
 661                         log_warning(LOG_PROTOCOL, "%s\n", log_msg);
 662         }
 663 }
 664