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what is difference between CDO and CDONTS

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hinchdog

Programmer
Feb 14, 2001
380
US
i want to know because i'm building a .dll that i want to send out emails periodically. i want to make sure this .dll will run on any server using CDONTS mail componenet. If i build it to use CDO will this accomplish that?
 
this is what i've found so far...

CDONTS provides a subset of the functionality of CDO. It is intended to provide reliable, fast, scaleable messaging for applications that don't need to make use of the more advanced calendaring and workflow capabilities that Exchange Server and CDO provide.
 
still more...


CDO is very good at leveraging Exchange Server 5.5 and supporting its more advanced features


CDONTS is good for creating fast, large-scale, mail applications, or adding mail and messaging to an existing application

If you need to support calendars, discussions, more complex messaging, public folders or workflow management, then CDO 1.2 is the better choice. On the other hand, if you want to create an application that will just handle simple mail messages, then CDONTS is more suitable.

It is also important to note that CDONTS applications are compatible with, and will not interfere with, CDO applications. This is because CDONTS does not have any MAPI functionality itself - that is, it does not have the API support for sending and receiving e-mail. Instead, CDONTS works on Internet Information Server or on Internet Information Server in conjunction with Microsoft Exchange Server.

Note also that CDO can run either against the SMTP service included with Windows 2000, or against Exchange Server 5.5.

However, in order to upgrade from running against an IIS/SMTP platform to running against Exchange Server, you'll need to use the Exchange IMS Wizard. This wizard removes the SMTP service of Internet Information Server and replaces it with Exchange.
 
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