What You Should Already Know

Where to Find the SMTP Plug-in Header File

Where to Find Messaging Server Information

New in This Release

Changes from 4.0 to 4.1

Changes from 3.0 to 4.0

Where to Find Information in This Guide

Document Conventions

Sample Code

This chapter explains how you can use SMTP plug-ins, provides some basic definitions, and describes the stages involved in message processing.

How You Can Use Messaging Server SMTP Plug-ins

How SMTP Plug-ins Work

Configuring SMTP Plug-ins

Building the SMTP Plug-in

Installing the SMTP Plug-in

This chapter describes using the Messaging Server Plug-in API to write SMTP plug-ins.

Writing the Initialization and Plug-in Functions

Writing the Initialization Function

Writing the Plug-in Function

SMTP Plug-in Return Codes

Using Messaging Server Plug-in Data Structures

The Parameter Block Structure

The Message Structure

The Message Recipient and RecipientList Parameters

Using Messaging Server Plug-in Functions

Accessing Control Data

This chapter is a reference to Messaging Server Plug-in API functions, data structures, and result codes that you can call in your own SMTP plug-ins.

Functions

AddControlInfo

AddRecipient

DupMessage

FreeControlData

FreeMessage

GetControlData

GetFirstRecipient

GetMessageFile

GetNextRecipient

GetPostOfficePath

GetRecipientAddress

pblock_findval

pFunc

pInitFunc

RemoveControlInfo

RemoveRecipient

Return Values for Functions

Data Structures

Address

AddressList

Message

pblock

Definitions

Result Codes

This sample SMTP plug-in DLL shows how to add a recipient to a message that goes through the server. This chapter takes you step by step through constructing a SMTP plug-in using the Messaging Server Plug-in API.

The SamplePlugin DLL

SMTP Plug-in Code

This appendix tells you how to upgrade your existing Messaging Server Plug-in API 3.0 and 4.0 files to 4.1.

Upgrade Summary

Changes to Functions

Changes to Structures

Replacing Dropped 3.0 Functions

Last Updated: 05/13/99 11:41:54