PJ Naughter's stmp

/* Module : PJNSMTP.CPP Purpose: Implementation for a MFC class encapsulation of the SMTP protocol Created: PJN / 22-05-1998 History: PJN / 15-06-1998 1) Fixed the case where a single dot occurs on its own in the body of a message 2) Class now supports Reply-To Header Field 3) Class now supports file attachments PJN / 18-06-1998 1) Fixed a memory overwrite problem which was occurring with the buffer used for encoding base64 attachments PJN / 27-06-1998 1) The case where a line begins with a "." but contains other text is now also catered for. See RFC821, Section 4.5.2 for further details. 2) m_sBody in CPJNSMTPMessage has now been made protected. Client applications now should call AddBody instead. This ensures that FixSingleDot is only called once even if the same message is sent a number of times. 3) Fixed a number of problems with how the MIME boundaries were defined and sent. 4) Got rid of an unreferenced formal parameter compiler warning when doing a release build PJN / 11-09-1998 1) VC 5 project file is now provided 2) Attachment array which the message class contains now uses references instead of pointers. 3) Now uses Sleep(0) to yield our time slice instead of Sleep(100), this is the preferred way of writting polling style code in Win32 without serverly impacting performance. 4) All Trace statements now display the value as returned from GetLastError 5) A number of extra asserts have been added 6) A AddMultipleRecipients function has been added which supports added a number of recipients at one time from a single string 7) Extra trace statements have been added to help in debugging PJN / 12-09-98 1) Removed a couple of unreferenced variable compiler warnings when code was compiled with Visual C++ 6.0 2) Fixed a major bug which was causing an ASSERT when the CSMTPAttachment destructor was being called in the InitInstance of the sample app. This was inadvertingly introduced for the 1.2 release. The fix is to revert fix 2) as done on 11-09-1998. This will also help to reduce the number of attachment images kept in memory at one time. PJN / 18-01-99 1) Full CC & BCC support has been added to the classes PJN / 22-02-99 1) Addition of a Get and SetTitle function which allows a files attachment title to be different that the original filename 2) AddMultipleRecipients now ignores addresses if they are empty. 3) Improved the reading of responses back from the server by implementing a growable receive buffer 4) timeout is now 60 seconds when building for debug PJN / 25-03-99 1) Now sleeps for 250 ms instead of yielding the time slice. This helps reduce CPU usage when waiting for data to arrive in the socket PJN / 14-05-99 1) Fixed a bug with the way the code generates time zone fields in the Date headers. PJN / 10-09-99 1) Improved CPJNSMTPMessage::GetHeader to include mime field even when no attachments are included. PJN / 16-02-00 1) Fixed a problem which was occuring when code was compiled with VC++ 6.0. PJN / 19-03-00 1) Fixed a problem in GetHeader on Non-English Windows machines 2) Now ships with a VC 5 workspace. I accidentally shipped a VC 6 version in one of the previous versions of the code. 3) Fixed a number of UNICODE problems 4) Updated the sample app to deliberately assert before connecting to the author's SMTP server. PJN / 28-03-00 1) Set the release mode timeout to be 10 seconds. 2 seconds was causing problems for slow dial up networking connections. PJN / 07-05-00 1) Addition of some ASSERT's in CPJNSMTPSocket::Connect PP / 16-06-00 The following modifications were done by Puneet Pawaia 1) Removed the base64 encoder from this file 2) Added the base64 encoder/decoder implementation in a separate file. This was done because base64 decoding was not part of the previous implementation 3) Added support for ESMTP connection. The class now attempts to authenticate the user on the ESMTP server using the username and passwords supplied. For this connect now takes the username and passwords as parameters. These can be null in which case ESMTP authentication is not attempted 4) This class can now handle AUTH LOGIN and AUTH LOGIN PLAIN authentication schemes on PP / 19-06-00 The following modifications were done by Puneet Pawaia 1) Added the files md5.* containing the MD5 digest generation code after modifications so that it compiles with VC++ 6 2) Added the CRAM-MD5 login procedure. PJN / 10-07-00 1) Fixed a problem with sending attachments > 1K in size 2) Changed the parameters to CPJNSMTPConnection::Connect PJN / 30-07-00 1) Fixed a bug in AuthLogin which was transmitting the username and password with an extra "=" which was causing the login to failure. Thanks to Victor Vogelpoel for finding this. PJN / 05-09-00 1) Added a CSMTP_NORSA preprocessor macro to allow the CPJNSMTPConnection code to be compiled without the dependence on the RSA code. PJN / 28-12-2000 1) Removed an unused variable from ConnectESMTP. 2) Allowed the hostname as sent in the HELO command to be specified at run time in addition to using the hostname of the client machine 3) Fixed a problem where high ascii characters were not being properly encoded in the quoted-printable version of the body sent. 4) Added support for user definable charset's for the message body. 5) Mime boundaries are now always sent irrespective if whether attachments are included or not. This is required as the body is using quoted-printable. 6) Fixed a bug in sendLines which was causing small message bodies to be sent incorrectly 7) Now fully supports custom headers in the SMTP message 8) Fixed a copy and paste bug where the default port for the SMTP socket class was 110. 9) You can now specify the address on which the socket is bound. This enables the programmer to decide on which NIC data should be sent from. This is especially useful on a machine with multiple IP addresses. 10) Addition of funct