Search email on IMAP4 Server and MS Exchange Server. It doesn't support POP3 protocol.
[Visual Basic 6.0] Public Property Get GetMailInfosParam() As GetMailInfosParamType
[Visual C++] public: get_GetMailInfosParam(IGetMailInfosParamType** pVal);
Property Value
Remarks
By default, GetMailInfoList method returns all emails in "INBOX". You can use SelectFolder method to retrieve email list in selected folder.
GetMailInfosParam property can set some filters for returned email list on server.
For example, you can use GetMailInfosParam property to retrieve only unread/new email(s) from server, then use MarkAsRead method to mark the email as read to prevent retrieving the same email again.
GetMailInfosParamType Members
| Members name | Description | 
| GetMailInfosOptions | Specify the filter flags, it can be combined by any GetMailInfosOptionType value. | 
| CategoryFilter | 
            Search emails that have specific categories, only Graph API supports this feature.
            
  | 
    
| FollowUpFlag | Search emails that have specific follow-up flag, only Graph API supports this feature. Use one of "notFlagged", "complete", "flagged". | 
| Reset | This method resets GetMailInfosParam to default value. | 
| SeqRange | Search emails in specified IMAP4 sequence range. | 
| UIDRange | Search emails in specified IMAP4 UID range. | 
| DateRangeSINCE/DateRangeBEFORE | Search emails in specified date time range. | 
| SenderContains | Search emails that sender contains specified value. | 
| ToOrCcContains | Search emails that To or Cc contains specified value. | 
| SubjectContains | Search emails that subject contains specified value. | 
| BodyContains | Search emails that body contains specified value. | 
| HeaderContains | Search emails that headers contain specified header, the syntax is: header: value; For example, "Message-ID: <mymessageid>" can search email by message-id. | 
GetMailInfosOptionType Members
| Members name | Description | 
| GetMailInfos_All | Search all emails. | 
        
| GetMailInfos_NewOnly | Search emails with unread flags. | 
| GetMailInfos_ReadOnly | Search emails with read flags. | 
| GetMailInfos_SeqRange | Search emails in specified IMAP4 sequence range. | 
| GetMailInfos_UIDRange | Search emails in specified IMAP4 UID range. | 
| GetMailInfos_PR_ENTRYID | Reserved. | 
| GetMailInfos_DateRange | Search emails in specified date time range. | 
| GetMailInfos_OrderByDateTime | Sort emails by date time ascending. | 
| GetMailInfos_GetCategories | Retrieve categories to MailInfo.Categories property, only Graph API and EWS support this feature. By default, GetMailInfos method doesn't retrieve categories to MailInfo.Categories property. | 
| GetMailInfos_GetFollowUpFlag | Retrieve follow-up flag to MailInfo.FollowUpFlag property, only Graph API and EWS support this feature. By default, GetMailInfos method doesn't retrieve follow-up flag to MailInfo.FollowUpFlag property. | 
| GetMailInfos_IncludeAllFolders | Search emails in all folders instead in current folder, only Graph API supports this feature. | 
Example
[Visual Basic 6.0, VBScript, Visual C++, Delphi] The following example demonstrates how to search emails with conditions. To get the full samples of EAGetMail, please refer to Samples section.
[Visual Basic 6.0]
Public Sub ReceiveMail( _
ByVal sServer As String, _
ByVal sUserName As String, _
ByVal sPassword As String, _
ByVal bSSLConnection As Boolean)
    
    Const MailServerPop3 = 0
    Const MailServerImap4 = 1
    Const MailServerEWS = 2
    Const MailServerDAV = 3
    Const MailServerMsGraph = 4
    Const GetMailInfos_All = 1
    Const GetMailInfos_NewOnly = 2
    Const GetMailInfos_ReadOnly = 4
    Const GetMailInfos_SeqRange = 8
    Const GetMailInfos_UIDRange = 16
    Const GetMailInfos_PR_ENTRYID = 32
    Const GetMailInfos_DateRange = 64
    Const GetMailInfos_OrderByDateTime = 128
    'For evaluation usage, please use "TryIt" as the license code, otherwise the
    '"invalid license code" exception will be thrown. However, the object will expire in 1-2 months, then
    '"trial version expired" exception will be thrown.
    Dim oClient As New EAGetMailObjLib.MailClient
    oClient.LicenseCode = "TryIt"
    
    'To receive email with Exchange Web Service, please change
    'MailServerImap4 to MailServerEWS to MailServer.Protocol
    'To receive email with Exchange WebDAV, please change
    'MailServerImap4 to MailServerDAV to MailServer.Protocol
    'Exchange Server supports POP3/IMAP4 protocol as well, but in Exchange 2007
    'or later version, POP3/IMAP4 service is disabled by default. If you don't want to use POP3/IMAP4
    'to download email from Exchange Server, you can use Exchange Web Service(Exchange 2007/2010 or
    'later version) or WebDAV(Exchange 2000/2003) protocol.
    Dim oServer As New EAGetMailObjLib.MailServer
    oServer.Server = sServer
    oServer.User = sUserName
    oServer.Password = sPassword
    oServer.SSLConnection = bSSLConnection
    oServer.Protocol = MailServerImap4
    
    ''by default, the pop3 port is 110, imap4 port is 143,
    'the pop3 ssl port is 995, imap4 ssl port is 993
    'you can also change the port like this
    'oServer.Port = 110
    If oServer.Protocol = MailServerImap4 Then
        If oServer.SSLConnection Then
            oServer.Port = 993 'SSL IMAP4
        Else
            oServer.Port = 143 'IMAP4 normal
        End If
    Else
        If oServer.SSLConnection Then
            oServer.Port = 995 'SSL POP3
        Else
            oServer.Port = 110 'POP3 normal
        End If
    End If
    
    On Error GoTo ErrorHandle
        oClient.Connect oServer
        ' get emails that have:
        ' unread/new flag and received datetime is from now to 2013-10-1
        ' and sender contains "support" and subject contains "test"
        
        Dim options
        options = GetMailInfos_NewOnly
        options = options Or GetMailInfos_DateRange
        options = options Or GetMailInfos_OrderByDateTime
        oClient.GetMailInfosParam.Reset
        oClient.GetMailInfosParam.GetMailInfosOptions = options
        oClient.GetMailInfosParam.SubjectContains = "test"
        oClient.GetMailInfosParam.SenderContains = "support"
        oClient.GetMailInfosParam.DateRangeSINCE = "2013-10-1"
        oClient.GetMailInfosParam.DateRangeBEFORE = Now()
        'More Examples:
        'Get only new email:
        'Dim options
        'options = GetMailInfos_NewOnly
        'oClient.GetMailInfosParam.GetMailInfosOptions = options
        
        'Get only new email that subject contains "test":
        'Dim options
        'options = GetMailInfos_NewOnly
        'oClient.GetMailInfosParam.GetMailInfosOptions = options
        'oClient.GetMailInfosParam.SubjectContains = "test"
        'Get emails by IMAP4 sequence range:
        'Dim options 
        'options= GetMailInfos_SeqRange
        'oClient.GetMailInfosParam.GetMailInfosOptions = options
        'oClient.GetMailInfosParam.SeqRange = "1:10" 
        
        Dim infos As EAGetMailObjLib.MailInfoCollection
        Set infos = oClient.GetMailInfoList()
        
        Dim i
        For i = 0 To infos.Count - 1
            Dim info As EAGetMailObjLib.MailInfo
            Set info = infos.Item(i)
            
            MsgBox "UIDL: " & info.UIDL
            MsgBox "Index: " & info.Index
            MsgBox "Size: " & info.Size
            'For POP3/Exchange Web Service/WebDAV, the IMAP4MailFlags is meaningless.
            MsgBox "Flags: " & info.IMAP4Flags 
            'For POP3, the Read is meaningless.
            MsgBox "Read: " & info.Read
            MsgBox "Deleted: " & info.Deleted
            Dim oMail As EAGetMailObjLib.Mail
            Set oMail = oClient.GetMail(info)
            'Save mail to local
            oMail.SaveAs "d:\tempfolder\" & i & ".eml", True
            ' Delete email from server
            oClient.Delete info
        Next
        '' Delete method just mark the email as deleted,
        ' Quit method expunge the emails from server permanently.
        oClient.Quit
        Exit Sub
ErrorHandle:
        ''Error handle
        MsgBox Err.Description
        
        oClient.Close
End Sub
[VBScript]
Sub ReceiveMail( _
ByVal sServer, _
ByVal sUserName, _
ByVal sPassword, _
ByVal bSSLConnection)
    
    Const MailServerPop3 = 0
    Const MailServerImap4 = 1
    Const MailServerEWS = 2
    Const MailServerDAV = 3
    Const MailServerMsGraph = 4
    Const GetMailInfos_All = 1
    Const GetMailInfos_NewOnly = 2
    Const GetMailInfos_ReadOnly = 4
    Const GetMailInfos_SeqRange = 8
    Const GetMailInfos_UIDRange = 16
    Const GetMailInfos_PR_ENTRYID = 32
    Const GetMailInfos_DateRange = 64
    Const GetMailInfos_OrderByDateTime = 128
    'For evaluation usage, please use "TryIt" as the license code, otherwise the
    '"invalid license code" exception will be thrown. However, the object will expire in 1-2 months, then
    '"trial version expired" exception will be thrown.
    Dim oClient
    Set oClient = CreateObject("EAGetMailObj.MailClient")
    oClient.LicenseCode = "TryIt"
    'To receive email with Exchange Web Service, please change
    'MailServerImap4 to MailServerEWS to MailServer.Protocol
    'To receive email with Exchange WebDAV, please change
    'MailServerImap4 to MailServerDAV to MailServer.Protocol
    'Exchange Server supports POP3/IMAP4 protocol as well, but in Exchange 2007
    'or later version, POP3/IMAP4 service is disabled by default. If you don't want to use POP3/IMAP4
    'to download email from Exchange Server, you can use Exchange Web Service(Exchange 2007/2010 or
    'later version) or WebDAV(Exchange 2000/2003) protocol.
    Dim oServer
    Set oServer = CreateObject("EAGetMailObj.MailServer")
    oServer.Server = sServer
    oServer.User = sUserName
    oServer.Password = sPassword
    oServer.SSLConnection = bSSLConnection
    oServer.Protocol = MailServerImap4
    
    ''by default, the pop3 port is 110, imap4 port is 143,
    'the pop3 ssl port is 995, imap4 ssl port is 993
    'you can also change the port like this
    'oServer.Port = 110
    If oServer.Protocol = MailServerImap4 Then
        If oServer.SSLConnection Then
            oServer.Port = 993 'SSL IMAP4
        Else
            oServer.Port = 143 'IMAP4 normal
        End If
    Else
        If oServer.SSLConnection Then
            oServer.Port = 995 'SSL POP3
        Else
            oServer.Port = 110 'POP3 normal
        End If
    End If
    
    oClient.Connect oServer
    ' get emails that have:
    ' unread/new flag and received datetime is from now to 2013-10-1
    ' and sender contains "support" and subject contains "test"
    
    Dim options
    options = GetMailInfos_NewOnly
    options = options Or GetMailInfos_DateRange
    options = options Or GetMailInfos_OrderByDateTime
    oClient.GetMailInfosParam.Reset
    oClient.GetMailInfosParam.GetMailInfosOptions = options
    oClient.GetMailInfosParam.SubjectContains = "test"
    oClient.GetMailInfosParam.SenderContains = "support"
    oClient.GetMailInfosParam.DateRangeSINCE = "2013-10-1"
    oClient.GetMailInfosParam.DateRangeBEFORE = Now()
    'More Examples:
    'Get only new email:
    'Dim options
    'options = GetMailInfos_NewOnly
    'oClient.GetMailInfosParam.GetMailInfosOptions = options
        
    'Get only new email that subject contains "test":
    'Dim options
    'options = GetMailInfos_NewOnly
    'oClient.GetMailInfosParam.GetMailInfosOptions = options
    'oClient.GetMailInfosParam.SubjectContains = "test"
    'Get emails by IMAP4 sequence range:
    'Dim options 
    'options= GetMailInfos_SeqRange
    'oClient.GetMailInfosParam.GetMailInfosOptions = options
    'oClient.GetMailInfosParam.SeqRange = "1:10" 
    
    Dim infos
    Set infos = oClient.GetMailInfoList()
    
    Dim i
    For i = 0 To infos.Count - 1
        Dim info
        Set info = infos.Item(i)
        
        MsgBox "UIDL: " & info.UIDL
        MsgBox "Index: " & info.Index
        MsgBox "Size: " & info.Size
        'For POP3/Exchange Web Service/WebDAV, the IMAP4MailFlags is meaningless.
        MsgBox "Flags: " & info.IMAP4Flags 
        'For POP3, the Read is meaningless.
        MsgBox "Read: " & info.Read
        MsgBox "Deleted: " & info.Deleted
                    
        Dim oMail
        Set oMail = oClient.GetMail(info)
        'Save mail to local
        oMail.SaveAs "d:\tempfolder\" & i & ".eml", True
        ' Delete email from server
        oClient.Delete info
    Next
    '' Delete method just mark the email as deleted,
    ' Quit method expunge the emails from server permanently.
    oClient.Quit
End Sub
[Visual C++]
#include "stdafx.h"
#include <windows.h>
#include "eagetmailobj.tlh"
using namespace EAGetMailObjLib;
void ReceiveMail( 
        LPCTSTR sServer, 
        LPCTSTR sUserName,
        LPCTSTR sPassword,
        bool bSSLConnection)
{
    ::CoInitialize(NULL);
    const int MailServerPop3 = 0;
    const int MailServerImap4 = 1;
    const int MailServerEWS = 2;
    const int MailServerDAV = 3;
    const int MailServerMsGraph = 4;
	const int GetMailInfos_All = 1;
	const int GetMailInfos_NewOnly = 2;
	const int GetMailInfos_ReadOnly = 4;
	const int GetMailInfos_SeqRange = 8;
	const int GetMailInfos_UIDRange = 16;
	const int GetMailInfos_PR_ENTRYID = 32;
	const int GetMailInfos_DateRange = 64;
	const int GetMailInfos_OrderByDateTime = 128;
    try
    {
        IMailClientPtr oClient;
        oClient.CreateInstance(__uuidof(EAGetMailObjLib::MailClient));
        IMailServerPtr oServer;
        oServer.CreateInstance(__uuidof(EAGetMailObjLib::MailServer));
        
        // For evaluation usage, please use "TryIt" as the license code, otherwise the
        // "invalid license code" exception will be thrown. However, the object will expire in 1-2 months, then
        // "trial version expired" exception will be thrown.
        oClient->LicenseCode = _T("TryIt");
        oServer->Server = sServer;
        oServer->User = sUserName;
        oServer->Password = sPassword;
        
        INT nProtocol = MailServerImap4;
        //To receive email with Exchange Web Service, please change
        //MailServerImap4 to MailServerEWS to MailServer.Protocol
        //To receive email with Exchange WebDAV, please change
        //MailServerImap4 to MailServerDAV to MailServer.Protocol
        //Exchange Server supports POP3/IMAP4 protocol as well, but in Exchange 2007
        //or later version, POP3/IMAP4 service is disabled by default. If you don't want to use POP3/IMAP4
        //to download email from Exchange Server, you can use Exchange Web Service(Exchange 2007/2010 or
        //later version) or WebDAV(Exchange 2000/2003) protocol.
        //For Exchange Web Service/WebDAV, please ignore 
        //Port property. But for Exchange Web Service, please set SSLConnection to True
        oServer->Protocol = nProtocol;
        if(nProtocol == MailServerPop3)
        {
            if(bSSLConnection)
            {
                oServer->Port = 995;
                oServer->SSLConnection = VARIANT_TRUE;
            }
            else
            {
                oServer->Port = 110;
            }
        }
        else
        {
            if(bSSLConnection)
            {
                oServer->Port = 993;
                oServer->SSLConnection = VARIANT_TRUE;
            }
            else
            {
                oServer->Port = 143;
            }
        }
        oClient->Connect(oServer);
        // get emails that have:
        // unread/new flag and received datetime is from now to latest one year (12 months)
        // and sender contains "support" and subject contains "test"
        
        int options = GetMailInfos_NewOnly;
        options = (options | GetMailInfos_DateRange);
        options = (options | GetMailInfos_OrderByDateTime);
        oClient->GetMailInfosParam->Reset();
        oClient->GetMailInfosParam->GetMailInfosOptions = options;
        oClient->GetMailInfosParam->SubjectContains = _T("test");
        oClient->GetMailInfosParam->SenderContains = _T("support");
        SYSTEMTIME tcur;
        ::GetSystemTime(&tcur);
        DATE DateRangeBEFORE = 0;
        ::SystemTimeToVariantTime(&tcur, &DateRangeBEFORE);
        DATE DateRangeSINCE = 0;
        tcur.wYear -= 1;
        ::SystemTimeToVariantTime(&tcur, &DateRangeSINCE);
        
        oClient->GetMailInfosParam->DateRangeSINCE = DateRangeSINCE;
        oClient->GetMailInfosParam->DateRangeBEFORE = DateRangeBEFORE;
        //More Examples:
        //Get only new email:
        //oClient->GetMailInfosParam->GetMailInfosOptions = GetMailInfos_NewOnly;
        
        //Get only new email that subject contains "test":
        //oClient->GetMailInfosParam->GetMailInfosOptions = GetMailInfos_NewOnly;
        //oClient->GetMailInfosParam->SubjectContains = _T("test");
        //Get emails by IMAP4 sequence range:
        //oClient->GetMailInfosParam->GetMailInfosOptions = GetMailInfos_SeqRange;
        //oClient->GetMailInfosParam->SeqRange = _T("1:10");
        
        IMailInfoCollectionPtr infos = oClient->GetMailInfoList();
        for(long i = 0; i < infos->Count; i++)
        {
            IMailInfoPtr pInfo = infos->GetItem(i);
            
            _tprintf(_T("UIDL: %s\r\n"), (TCHAR*)pInfo->UIDL);
            _tprintf(_T("Index: %d\r\n"), pInfo->Index);
            _tprintf(_T("Size: %d\r\n"), pInfo->Size);
            //For POP3/Exchange Web Service/WebDAV, the IMAP4MailFlags is meaningless
            _tprintf(_T("Flags: %s\r\n"), (TCHAR*)pInfo->IMAP4Flags);
            //For POP3, the Read is meaningless
            _tprintf(_T("Read: %s\r\n"), (pInfo->Read == VARIANT_TRUE)?_T("TRUE"):_T("FALSE"));
            _tprintf(_T("Deleted: %s\r\n"), (pInfo->Deleted == VARIANT_TRUE)?_T("TRUE"):_T("FALSE"));
            IMailPtr oMail = oClient->GetMail(pInfo);
            TCHAR szFile[MAX_PATH+1];
            memset(szFile, 0, sizeof(szFile));
            ::wsprintf(szFile, _T("d:\\tempfolder\\%d.eml"), i);
            //save to local disk
            oMail->SaveAs(szFile, VARIANT_TRUE);
            oMail.Release();
            // delete email from server
            oClient->Delete(pInfo);
        }
        // Delete method just mark the email as deleted, 
        // Quit method expunge the emails from server permanently.
        oClient->Quit();
    }
    catch(_com_error &ep)
    {
        _tprintf(_T("ERROR: %s\r\n"),  (TCHAR*)ep.Description());
    }
    ::CoUninitialize();
}
[Delphi]
unit Unit1;
interface
uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls, EAGetMailObjLib_TLB;
type
    TForm1 = class(TForm)
        Button1: TButton;
    private
        { Private declarations }
        procedure ReceiveMail(server: WideString; user: WideString; password: WideString; useSslConnection: Boolean);
    public
        { Public declarations }
    end;
const
    MailServerPop3 = 0;
    MailServerImap4 = 1;
    MailServerEWS = 2;
    MailServerDAV = 3;
    // GetMailInfosParam Flags
    GetMailInfos_All = 1;
    GetMailInfos_NewOnly = 2;
    GetMailInfos_ReadOnly = 4;
    GetMailInfos_SeqRange = 8;
    GetMailInfos_UIDRange = 16;
    GetMailInfos_PR_ENTRYID = 32;
    GetMailInfos_DateRange = 64;
    GetMailInfos_OrderByDateTime = 128;
var
    Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.ReceiveMail(server: WideString; user: WideString; password: WideString; useSslConnection: Boolean);
var
    oServer: TMailServer;
    oClient: TMailClient;
    oTools: TTools;
    oMail: IMail;
    infos: IMailInfoCollection;
    oInfo: IMailInfo;
    localInbox, fileName: WideString;
    i: Integer;
begin
    try
        // set current thread code page to system default code page.
        SetThreadLocale(GetSystemDefaultLCID());
        oTools := TTools.Create(Application);
        // Create a folder named "inbox" under
        // current directory to store the email files
        localInbox := GetCurrentDir() + '\inbox';
        oTools.CreateFolder(localInbox);
        oServer := TMailServer.Create(Application);
        oServer.Server := server;
        oServer.User := user;
        oServer.Password := password;
        oServer.Protocol := MailServerImap4;
        // Enable SSL/TLS Connection, most modern email server require SSL/TLS connection by default.
        oServer.SSLConnection := true;
        // Set 993 SSL IMAP4 port
        oServer.Port := 993;
        // If your IMAP doesn't deploy SSL connection
        // Please use
        // oServer.SSLConnection := false;
        // oServer.Port := 143;
        oClient := TMailClient.Create(Application);
        oClient.LicenseCode := 'TryIt';
        oClient.Connect1(oServer.DefaultInterface);
        ShowMessage('Connected!');
        // retrieve unread/new email only
        oClient.GetMailInfosParam.Reset();
        oClient.GetMailInfosParam.GetMailInfosOptions := GetMailInfos_NewOnly;
        infos := oClient.GetMailInfoList();
        ShowMessage(Format('Total %d unread email(s)', [infos.Count]));
        for i := 0 to infos.Count - 1 do
            begin
                oInfo := infos.Item[i];
                ShowMessage(Format('Index: %d; Size: %d; UIDL: ' + oInfo.UIDL,
                [oInfo.Index, oInfo.Size]));
                // Generate a random file name by current local datetime,
                // You can use your method to generate the filename if you do not like it
                fileName := localInbox + '\' + oTools.GenFileName(i) + '.eml';
                // Receive email from IMAP server
                oMail := oClient.GetMail(oInfo);
                ShowMessage('From: ' + oMail.From.Address + #13#10 +
                    'Subject: ' + oMail.Subject);
                // Save email to local disk
                oMail.SaveAs(fileName, true);
                // mark unread email as read, next time this email won't be retrieved again
                if not oInfo.Read then
                    oClient.MarkAsRead(oInfo, true);
                // if you don't want to leave a copy on server, please use
                //  oClient.Delete(oInfo);
                // instead of MarkAsRead
            end;
        // Quit and expunge emails marked as deleted from IMAP server
        oClient.Quit;
    except
        on ep:Exception do
            ShowMessage('Error: ' + ep.Message);
    end;
end;
end.
    See Also
        MailClient.GetMailInfos Method
        User Authentication and SSL/TLS Connection
        MailClient.Connect Method
        MailClient.SelectFolder Method
    
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