Inheritance: IMailbox
Beispiel #1
0
        private void _bRetrieveMessages_Click(object sender, EventArgs e)
        {
            // We create Imap client
            imap = new Imap4Client();

            try
            {
                // We connect to the imap4 server
                imap.Connect(_tbImap4Server.Text);

                this.AddLogEntry(string.Format("Connection to {0} successfully", _tbImap4Server.Text));

                // Login to mail box
                imap.Login(_tbUserName.Text, _tbPassword.Text);

                this.AddLogEntry(string.Format("Login to {0} successfully", _tbImap4Server.Text));

                inbox = imap.SelectMailbox("inbox");
                if (inbox.MessageCount > 0)
                {
                    for (int i = 1; i < inbox.MessageCount + 1; i++)
                    {
                        ActiveUp.Net.Mail.Message message = inbox.Fetch.MessageObject(i);
                        ListViewItem lvi = new ListViewItem();
                        lvi.Text = i.ToString("0000");
                        lvi.SubItems.AddRange(new string[] { message.Subject});
                        lvi.Tag = message;

                        _lvMessages.Items.Add(lvi);

                        this.AddLogEntry(string.Format("{3} Subject: {0} From :{1} Message Body {2}"
                                        , message.Subject, message.From.Email, message.BodyText, i.ToString("0000")));
                    }
                }

                else
                {
                    this.AddLogEntry("There is no unanswered messages in the imap4 account");
                }

            }

            catch (Imap4Exception iex)
            {
                this.AddLogEntry(string.Format("Imap4 Error: {0}", iex.Message));
            }

            catch (Exception ex)
            {
                this.AddLogEntry(string.Format("Failed: {0}", ex.Message));
            }
   
        }
Beispiel #2
0
        //private void ConnectPop()
        //{
        //    Pop3Client pop3Client;

        //    pop3Client = new ActiveUp.Net.Mail.Pop3Client();
        //    pop3Client.Connect("pop3.smartcloudpt.pt", 995 ,true);
        //    pop3Client.Authenticate(textBox1.Text, textBox2.Text);

        //    bs = new BindingSource();
        //    int count = pop3Client.GetMessageCount();

        //    DataTable dtMessages = new DataTable();
        //    dtMessages.Columns.Add("MessageNumber");
        //    dtMessages.Columns.Add("From");
        //    dtMessages.Columns.Add("Subject");
        //    dtMessages.Columns.Add("DateSent");
        //    int counter = 0;
        //    for (int i = count; i >= 1; i--)
        //    {
        //        OpenPop.Mime.Message message = pop3Client.GetMessage(i);
        //        dtMessages.Rows.Add();
        //        dtMessages.Rows[dtMessages.Rows.Count - 1]["MessageNumber"] = i;
        //        dtMessages.Rows[dtMessages.Rows.Count - 1]["From"] = message.Headers.From;
        //        dtMessages.Rows[dtMessages.Rows.Count - 1]["Subject"] = message.Headers.Subject;
        //        dtMessages.Rows[dtMessages.Rows.Count - 1]["DateSent"] = message.Headers.DateSent;
        //        counter++;
        //        if (counter > 5)
        //        {
        //         //   break;
        //        }
        //    }
        //    bs.DataSource = dtMessages;

        //}
        private void connectImap()
        {
            Imap4Client imap = new Imap4Client();

            imap.ConnectSsl(servertxt.Text, 993);
            imap.Login(textBox1.Text, textBox2.Text);
            ActiveUp.Net.Mail.Mailbox mbox = imap.SelectMailbox("Inbox");
            MessageCollection         messages;

            // List<long> uids;
            if (todayRB.Checked)
            {
                //uids = imap.Search(Expression.Since(DateTime.Now));
                messages = mbox.SearchParse("SINCE " + DateTime.Now.ToString("dd-MMM-yyyy hh:mm:ss"));
            }
            else if (specRb.Checked)
            {
                //uids = imap.Search(Expression.And(Expression.Since(specDate.Value),Expression.Before(specDate.Value)));
                messages = mbox.SearchParse("SINCE " + specDate.Value.ToString("dd-MMM-yyyy hh:mm:ss") + " NOT BEFORE " + specDate.Value.AddDays(-1).ToString("dd-MM-yyyy hh:mm:ss"));
            }
            else
            {
                //uids = imap.Search(Expression.And(Expression.Since(deDP.Value), Expression.Before(ateDP.Value)));
                messages = mbox.SearchParse("SINCE " + deDP.Value.ToString("dd-MMM-yyyy hh:mm:ss") + " NOT BEFORE " + ateDP.Value.AddDays(-1).ToString("dd-MM-yyyy hh:mm:ss"));
            }
            foreach (ActiveUp.Net.Mail.Message mail in messages)
            {
                foreach (MimePart item in mail.Attachments)
                {
                    item.StoreToFile(pathUploadTxt.Text);
                }
                Console.WriteLine(mail.Date + " - " + mail.Subject);
            }
            //   foreach (long uid in uids)
            //   {
            //       byte[] eml = imap.GetMessageByUID(uid);
            //       IMail message = new MailBuilder().CreateFromEml(eml);
            //       foreach (MimeData mime in message.Attachments)

            //       {

            //           mime.Save( pathUploadTxt.Text+"\\" + mime.SafeFileName);

            //       }

            //       Console.WriteLine(message.Subject);
            //       Console.WriteLine(message.Text);
            //   }
            ////   MessageBox.Show("Leu emails");
            //   imap.Close(true);
        }
Beispiel #3
0
 /// <summary>
 /// Same as SelectMailbox() except that the mailbox is opened with read-only permission.
 /// </summary>
 /// <param name="mailboxName">The mailbox to be examined.</param>
 /// <returns>The examined mailbox.</returns>
 /// <example>
 /// <code>
 /// C#
 /// 
 /// Imap4Client imap = new Imap4Client();
 /// imap.Connect("mail.myhost.com");
 /// imap.Login("user","pass");
 /// Mailbox mbox = imap.ExamineMailbox("inbox.Staff");
 /// //The inbox.Staff mailbox is now selected (read-only).
 /// int recentMessageCount = mbox.Recent;
 /// //There are recentMessageCount messages that haven't been read in inbox.Staff.
 /// imap.Disconnect();
 /// 
 /// VB.NET
 /// 
 /// Dim imap As New Imap4Client
 /// imap.Connect("mail.myhost.com")
 /// imap.Login("user","pass")
 /// Dim mbox As Mailbox = imap.ExamineMailbox("inbox.Staff")
 /// 'The inbox.Staff mailbox is now selected (read-only).
 /// Dim recentMessageCount As Integer = mbox.Recent
 /// 'There are recentMessageCount messages that haven't been read in inbox.Staff.
 /// imap.Disconnect()
 /// 
 /// JScript.NET
 /// 
 /// var imap:Imap4Client = new Imap4Client();
 /// imap.Connect("mail.myhost.com");
 /// imap.Login("user","pass");
 /// var mbox:Mailbox = imap.ExamineMailbox("inbox.Staff");
 /// //The inbox.Staff mailbox is now selected (read-only).
 /// int recentMessageCount = mbox.Recent;
 /// //There are recentMessageCount messages that haven't been read in inbox.Staff.
 /// imap.Disconnect();
 /// </code>
 /// </example>
 public Mailbox ExamineMailbox(string mailboxName)
 {
     ActiveUp.Net.Mail.Mailbox mailbox = new ActiveUp.Net.Mail.Mailbox();
     string response = this.Command("examine \"" + mailboxName + "\"");
     string[] lines = System.Text.RegularExpressions.Regex.Split(response, "\r\n");
     mailbox.MessageCount =
         System.Convert.ToInt32(ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "EXISTS").Split(' ')[1]);
     mailbox.Recent =
         System.Convert.ToInt32(ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "RECENT").Split(' ')[1]);
     mailbox.FirstUnseen = (response.ToLower().IndexOf("[unseen") != -1)
                               ? System.Convert.ToInt32(
                                   ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[UNSEEN ").Split(' ')[3]
                                       .TrimEnd(']'))
                               : 0;
     mailbox.UidValidity =
         System.Convert.ToInt64(
             ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[UIDVALIDITY ").Split(' ')[3].TrimEnd(']'));
     foreach (string str in ActiveUp.Net.Mail.Imap4Client.FindLine(lines, " FLAGS").Split(' '))
         if (str.StartsWith("(\\") || str.StartsWith("\\"))
             mailbox.ApplicableFlags.Add(str.Trim(new char[] {' ', '\\', ')', '('}));
     if (response.ToLower().IndexOf("[permanentflags") != -1)
         foreach (string str in ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[PERMANENTFLAGS").Split(' '))
             if (str.StartsWith("(\\") || str.StartsWith("\\"))
                 mailbox.PermanentFlags.Add(str.Trim(new char[] {' ', '\\', ')', '('}));
     mailbox.Permission = ActiveUp.Net.Mail.MailboxPermission.ReadOnly;
     mailbox.Name = mailboxName;
     mailbox.SourceClient = this;
     return mailbox;
 }
Beispiel #4
0
        /// <summary>
        /// Selects a mailbox on the server.
        /// </summary>
        /// <param name="mailboxName">The mailbox to be selected.</param>
        /// <returns>The selected mailbox.</returns>
        /// <example>
        /// <code>
        /// C#
        /// 
        /// Imap4Client imap = new Imap4Client();
        /// imap.Connect("mail.myhost.com");
        /// imap.Login("user","pass");
        /// Mailbox mbox = imap.SelectMailbox("inbox.Staff");
        /// //The inbox.Staff mailbox is now selected.
        /// mbox.Empty(true);
        /// //Mailbox inbox.Staff is now empty.
        /// imap.Disconnect();
        /// 
        /// VB.NET
        /// 
        /// Dim imap As New Imap4Client
        /// imap.Connect("mail.myhost.com")
        /// imap.Login("user","pass")
        /// Dim mbox As Mailbox = imap.SelectMailbox("inbox.Staff")
        /// 'The inbox.Staff mailbox is now selected.
        /// mbox.Empty(true)
        /// 'Mailbox inbox.Staff is now empty.
        /// imap.Disconnect()
        /// 
        /// JScript.NET
        /// 
        /// var imap:Imap4Client = new Imap4Client();
        /// imap.Connect("mail.myhost.com");
        /// imap.Login("user","pass");
        /// var mbox:Mailbox = imap.SelectMailbox("inbox.Staff");
        /// //The inbox.Staff mailbox is now selected.
        /// mbox.Empty(true);
        /// //Mailbox inbox.Staff is now empty.
        /// imap.Disconnect();
        /// </code>
        /// </example>
        public Mailbox SelectMailbox(string mailboxName)
        {
            var mailbox_name = renderSafeParam(mailboxName);

            ActiveUp.Net.Mail.Mailbox mailbox = new ActiveUp.Net.Mail.Mailbox();
            string response = this.Command("select \"" + mailbox_name + "\"");
            string[] lines = System.Text.RegularExpressions.Regex.Split(response, "\r\n");

            // message count.
            int messageCount = 0;
            try
            {
                messageCount =
                    System.Convert.ToInt32(ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "EXISTS").Split(' ')[1]);
            }
            catch (Exception)
            {
            }
            mailbox.MessageCount = messageCount;

            // recent.
            int recent = 0;
            try
            {
                recent = System.Convert.ToInt32(ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "RECENT").Split(' ')[1]);
            }
            catch (Exception)
            {
            }
            mailbox.Recent = recent;

            // unseen.
            int unseen = 0;
            try
            {
                unseen =
                    System.Convert.ToInt32(
                        ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[UNSEEN ").Split(' ')[3].TrimEnd(']'));
            }
            catch (Exception)
            {
            }
            mailbox.FirstUnseen = (response.ToLower().IndexOf("[unseen") != -1) ? unseen : 0;

            // uid validity.
            int uidValidity = 0;
            try
            {
                uidValidity =
                    System.Convert.ToInt32(
                        ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[UIDVALIDITY ").Split(' ')[3].TrimEnd(']'));
            }
            catch (Exception)
            {
            }
            mailbox.UidValidity = uidValidity;

            // flags.
            foreach (string str in ActiveUp.Net.Mail.Imap4Client.FindLine(lines, " FLAGS").Split(' '))
            {
                if (str.StartsWith("(\\") || str.StartsWith("\\"))
                {
                    mailbox.ApplicableFlags.Add(str.Trim(new char[] {' ', '\\', ')', '('}));
                }
            }

            // permanent flags.
            if (response.ToLower().IndexOf("[permanentflags") != -1)
            {
                foreach (string str in ActiveUp.Net.Mail.Imap4Client.FindLine(lines, "[PERMANENTFLAGS").Split(' '))
                {
                    if (str.StartsWith("(\\") || str.StartsWith("\\"))
                    {
                        mailbox.PermanentFlags.Add(str.Trim(new char[] {' ', '\\', ')', '('}));
                    }
                }
            }

            // read-write and read-only.
            if (response.ToLower().IndexOf("[read-write]") != -1)
            {
                mailbox.Permission = ActiveUp.Net.Mail.MailboxPermission.ReadWrite;
            }
            else if (response.ToLower().IndexOf("[read-only]") != -1)
            {
                mailbox.Permission = ActiveUp.Net.Mail.MailboxPermission.ReadOnly;
            }

            mailbox.Name = mailboxName;
            mailbox.SourceClient = this;
            return mailbox;
        }
        // Returns: maxMessagesPerSession minus count of downloaded messages or zero if limit excided
        private int ProcessMessages( Mailbox mb,
            int folder_id,
            int last_uid,
            int max_messages_per_session,
            WaitHandle stop_event,
            string[] tags_names)
        {
            UpdateTimeCheckedIfNeeded();
            int[] uids_collection;

            try
            {
                uids_collection = mb.UidSearch("UID " + (0 != last_uid ? last_uid : 1) + ":*")
                    .Where(uid => uid != last_uid)
                    .ToArray();

                if (!uids_collection.Any()) throw new Exception("Empty folder");
            }
            catch (Exception)
            {
                _log.Info("New messages not found.");
                return max_messages_per_session;
            }

            var stored_uid_list = new Dictionary<int, string>();
            var stored_md5_list = new Dictionary<int, string>();

            InvokeGetStoredMessagesUIDL_MD5(stored_uid_list, stored_md5_list);

            var tags_hash = tags_names.Aggregate(string.Empty, (current, name) => current + name).GetMD5Hash();

            var new_messages = uids_collection
                .Select(
                    item_uid =>
                    new
                        {
                            uid = item_uid,
                            uidl = tags_names.Any()
                                ? string.Format("{0}-{1}-{2}-{3}", item_uid, folder_id, mb.UidValidity, tags_hash)
                                : string.Format("{0}-{1}-{2}", item_uid, folder_id, mb.UidValidity)
                        })
                .Where(msg => !stored_uid_list.Values.Contains(msg.uidl))
                .OrderByDescending(msg => msg.uid)
                .ToDictionary(msg => msg.uid, id => id.uidl);

            var quota_error_flag = false;
            var update_folder_uid_flag = new_messages.Any();

            int[] tags_ids = null;
            var message_ids_for_tag_update = new List<int>();
            var tags_retrieved = false;

            foreach (var new_message in new_messages)
            {
                int last_founded_message_id = -1;
                try
                {
                    if (stop_event.WaitOne(0))
                    {
                        _log.Debug("Stop event occure.");
                        break;
                    }

                    if (max_messages_per_session == 0)
                    {
                        _log.Debug("Limit of max messages per session is exceeded!");
                        update_folder_uid_flag = false;
                        break;
                    }

                    // flags should be retrieved before message fetch - because mail server
                    // could add seen flag right after message was retrieved by us
                    var flags = mb.Fetch.UidFlags(new_message.Key);

                    //Peek method didn't set \Seen flag on mail
                    var message = mb.Fetch.UidMessageObjectPeek(new_message.Key);
                    UpdateTimeCheckedIfNeeded();

                    if (message.Date < Account.BeginDate)
                    {
                        _log.Debug("Skip message (Date = {0}) on BeginDate = {1}", message.Date, Account.BeginDate);
                        break;
                    }

                    var unique_identifier = string.Format("{0}|{1}|{2}|{3}",
                                                          message.From.Email,
                                                          message.Subject,
                                                          message.DateString,
                                                          message.MessageId);

                    var header_md5 = unique_identifier.GetMD5();

                    //Get tags ids for folder before message proccessing only once
                    if (!tags_retrieved)
                    {
                        tags_ids = tags_names.Any() ? InvokeOnGetOrCreateTags(tags_names) : null;
                        tags_retrieved = true;
                    }

                    if (folder_id == MailFolder.Ids.inbox || !message.To.Exists(email =>
                                                                email.Email.ToLowerInvariant()
                                                               .Equals(message.From.Email.ToLowerInvariant())
                                                            )
                       )
                    {
                        var found_message_id = stored_md5_list
                            .Where(el => el.Value == header_md5)
                            .Select(el => el.Key)
                            .FirstOrDefault();

                        if (found_message_id > 0)
                        {
                            InvokeOnUpdateUidl(found_message_id, new_message.Value);
                            last_founded_message_id = found_message_id;
                            message_ids_for_tag_update.Add(found_message_id); //Todo: Remove id if exception happened
                            continue; // Skip saving founded message
                        }
                    }

                    var unread = null == flags["seen"];
                    InvokeOnRetrieve(message, folder_id, new_message.Value, header_md5, unread, tags_ids);
                }
                catch (IOException io_ex)
                {
                    if (io_ex.Message.StartsWith("Unable to write data to the transport connection") || 
                        io_ex.Message.StartsWith("Unable to read data from the transport connection"))
                    {
                        _log.Error("ProcessMessages() Account='{0}': {1}",
                             Account.EMail.Address, io_ex.ToString());
                        message_ids_for_tag_update.Remove(last_founded_message_id);
                        update_folder_uid_flag = false;
                        max_messages_per_session = 0; // stop checking other mailboxes

                        break;
                    }
                }
                catch (MailBoxOutException ex)
                {
                    _log.Info("ProcessMessages() Account='{0}': {1}",
                              Account.EMail.Address, ex.Message);
                    message_ids_for_tag_update.Remove(last_founded_message_id);
                    update_folder_uid_flag = false;
                    max_messages_per_session = 0; // stop checking other mailboxes

                    break;
                }
                catch (TenantQuotaException qex)
                {
                    _log.Info("Tenant {0} quota exception: {1}", Account.TenantId, qex.Message);
                    message_ids_for_tag_update.Remove(last_founded_message_id);
                    quota_error_flag = true;
                    update_folder_uid_flag = false;
                }
                catch (Exception e)
                {
                    _log.Error("ProcessMessages() Account='{0}', MessageId={1} Exception:\r\n{2}\r\n",
                               Account.EMail.Address, new_message, e.ToString());
                    update_folder_uid_flag = false;
                    message_ids_for_tag_update.Remove(last_founded_message_id);
                }

                UpdateTimeCheckedIfNeeded();
                max_messages_per_session--;
            }

            if (tags_ids != null && tags_ids.Length > 0 && message_ids_for_tag_update.Count > 0)
            {
                InvokeOnUpdateMessagesTags(Account.TenantId, Account.UserId, tags_ids, message_ids_for_tag_update.ToArray());
            }

            if (update_folder_uid_flag)
            {
                var max_uid = new_messages.Keys.Max();

                if(Account.ImapFolders.Keys.Contains(mb.Name))
                    Account.ImapFolders[mb.Name] = max_uid;
                else
                    Account.ImapFolders.Add(mb.Name, max_uid);

                Account.ImapFolderChanged = true;
            }

            InvokeOnDone(quota_error_flag);

            return max_messages_per_session;
        }
 /// <summary>
 /// Subscribe the client to the inbox
 /// </summary>
 private void SubscribeToInbox()
 {
     inbox = client.SelectMailbox("INBOX");
     inbox.Subscribe();
 }
Beispiel #7
0
        private int LoadMailboxMessage(Mailbox mb,
                                    int folderId,
                                    int maxMessagesPerSession,
                                    string[] tagsNames, out bool quotaErrorFlag)
        {
            UpdateTimeCheckedIfNeeded();

            ImapFolderUids folderUids;
            if (!Account.ImapIntervals.TryGetValue(mb.Name, out folderUids))
                folderUids = new ImapFolderUids(); // by default - mailbox never was processed before

            var imapIntervals = new ImapIntervals(folderUids.UnhandledUidIntervals);
            var beginDateUid = folderUids.BeginDateUid;

            quotaErrorFlag = false;

            int[] tagsIds = null;
            var tagsRetrieved = false;

            var allUids = mb.UidSearch("1:*").OrderBy(i => i).SkipWhile(i => i < beginDateUid).ToList();

            foreach (var uidsInterval in imapIntervals.GetUnhandledIntervalsCopy())
            {
                cancelToken.ThrowIfCancellationRequested();
                
                if (!mb.SourceClient.IsConnected)
                    break;
                
                if (maxMessagesPerSession == 0)
                    break;

                var interval = uidsInterval;
                var uidsCollection =
                    allUids.Select(u => u)
                            .Where(u => u <= interval.To && u >= interval.From)
                            .OrderByDescending(x => x)
                            .ToList();

                if (!uidsCollection.Any())
                {
                    if (!uidsInterval.IsToUidMax())
                        imapIntervals.AddHandledInterval(uidsInterval);
                    continue;
                }

                var toUid = uidsInterval.IsToUidMax()
                                 ? uidsCollection.First()
                                 : Math.Max(uidsInterval.To, uidsCollection.First());

                #region Loading messages

                foreach (var uid in uidsCollection)
                {
                    var hasParseError = false;

                    cancelToken.ThrowIfCancellationRequested();

                    try
                    {
                        if (!mb.SourceClient.IsConnected)
                        {
                            log.Warn("Imap4-server is disconnected. Skip another messages.");
                            break;
                        }

                        log.Debug("Processing new message\tUID: {0}", uid);

                        // flags should be retrieved before message fetch - because mail server
                        // could add seen flag right after message was retrieved by us
                        var flags = mb.Fetch.UidFlags(uid);

                        //Peek method didn't set \Seen flag on mail
                        var message = mb.Fetch.UidMessageObjectPeek(uid);

                        if (message.HasParseError)
                        {
                            log.Error("ActiveUp: message parsed with some errors. MailboxId = {0} Message UID = {1}", Account.MailBoxId, uid);
                            hasParseError = true;
                        }

                        UpdateTimeCheckedIfNeeded();

                        if (message.Date < Account.BeginDate)
                        {
                            log.Debug("Skip message (Date = {0}) on BeginDate = {1}", message.Date, Account.BeginDate);
                            imapIntervals.SetBeginIndex(toUid);
                            beginDateUid = toUid;
                            break;
                        }

                        var uniqueIdentifier = string.Format("{0}|{1}|{2}|{3}",
                                                              message.From.Email,
                                                              message.Subject,
                                                              message.DateString,
                                                              message.MessageId);

                        var headerMd5 = uniqueIdentifier.GetMd5();

                        //Get tags ids for folder before message proccessing only once
                        if (!tagsRetrieved)
                        {
                            tagsIds = tagsNames.Any() ? InvokeOnGetOrCreateTags(tagsNames) : null;
                            tagsRetrieved = true;
                        }

                        var unread = null == flags["seen"];
                        var uidl = string.Format("{0}-{1}", uid, folderId);
                        RetrieveMessage(message, folderId, uidl, headerMd5, hasParseError, unread, tagsIds);
                    }
                    catch (Exception e)
                    {
                        log.Error(
                            "ProcessMessages() Tenant={0} User='******' Account='{2}', MailboxId={3}, UID={4} Exception:\r\n{5}\r\n",
                            Account.TenantId, Account.UserId, Account.EMail.Address, Account.MailBoxId,
                            uid, e);

                        if (e is IOException || e is MailBoxOutException)
                        {
                            maxMessagesPerSession = 0; // stop checking other mailboxes
                        }
                        else if (e is TenantQuotaException)
                        {
                            quotaErrorFlag = true;
                        }

                        if (uid != uidsCollection.First() && uid != toUid)
                        {
                            imapIntervals.AddHandledInterval(new UidInterval(uid + 1, toUid));
                        }
                        toUid = uid - 1;

                        if (maxMessagesPerSession == 0)
                            break;

                        continue;
                    }

                    // after successfully message saving - lets update imap intervals state
                    imapIntervals.AddHandledInterval(
                        new UidInterval(
                            uid == uidsCollection.Last() && uidsInterval.IsFromUidMin() ? uidsInterval.From : uid, toUid));

                    toUid = uid - 1;

                    UpdateTimeCheckedIfNeeded();

                    maxMessagesPerSession--;

                    if (maxMessagesPerSession != 0) continue;

                    log.Info("Limit of max messages per session is exceeded!");
                    break;
                }

                #endregion

            }

            var updatedImapFolderUids = new ImapFolderUids(imapIntervals.ToIndexes(), beginDateUid);

            if (!Account.ImapIntervals.Keys.Contains(mb.Name))
            {
                Account.ImapFolderChanged = true;
                Account.ImapIntervals.Add(mb.Name, updatedImapFolderUids);
            }
            else if (Account.ImapIntervals[mb.Name] != updatedImapFolderUids)
            {
                Account.ImapFolderChanged = true;
                Account.ImapIntervals[mb.Name] = updatedImapFolderUids;
            }

            return maxMessagesPerSession;
        }
        private Header GetImapHeader(Mailbox mb, int uid)
        {
            var header_bytes = mb.Fetch.UidHeader(uid);

            var header = new Header {OriginalData = header_bytes};

            var hdr = Encoding.GetEncoding("iso-8859-1")
                              .GetString(header.OriginalData, 0, header.OriginalData.Length);

            hdr = RegxHeader.Match(hdr).Value;
            hdr = RegxUnfold.Replace(hdr, "");

            var m = RegxHeaderLines.Match(hdr);
            while (m.Success)
            {
                try
                {
                    var name = FormatFieldName(m.Value.Substring(0, m.Value.IndexOf(':')));
                    var value =
                        Codec.RFC2047Decode(m.Value.Substring(m.Value.IndexOf(":", StringComparison.Ordinal) + 1))
                             .Trim('\r', '\n')
                             .TrimStart(' ');
                    if (name.Equals("received")) header.Trace.Add(Parser.ParseTrace(m.Value.Trim(' ')));
                    else if (name.Equals("to")) header.To = Parser.ParseAddresses(value);
                    else if (name.Equals("cc")) header.Cc = Parser.ParseAddresses(value);
                    else if (name.Equals("bcc")) header.Bcc = Parser.ParseAddresses(value);
                    else if (name.Equals("reply-to")) header.ReplyTo = Parser.ParseAddress(value);
                    else if (name.Equals("from")) header.From = Parser.ParseAddress(value);
                    else if (name.Equals("sender")) header.Sender = Parser.ParseAddress(value);
                    else if (name.Equals("content-type")) header.ContentType = Parser.GetContentType(m.Value);
                    else if (name.Equals("content-disposition"))
                        header.ContentDisposition = Parser.GetContentDisposition(m.Value);

                    header.HeaderFields.Add(name, value);
                    header.HeaderFieldNames.Add(name, m.Value.Substring(0, m.Value.IndexOf(':')));
                }
                catch (Exception parser_header_line_ex)
                {
                    _log.Debug("Parser header field error: {0} ", parser_header_line_ex.ToString());
                }

                m = m.NextMatch();
            }

            return header;
        }
        private Message GetImapMessageAfterParseError(Mailbox mb, int uid)
        {
            var header = GetImapHeader(mb, uid);

            var message = new Message(header);

            var eml_message_string = mb.Fetch.UidMessageString(uid);

            message.AddAttachmentFromString("original_message.eml", eml_message_string);

            return message;
        }