One of the most basic things you might want to do with EWS is Send a Message, while its may sound easy sending messages programmatically can be at times confusing. But first lets take one step back for a second from EWS and look at the different ways you could send Email programmatically on Exchange. SMTP : (Simple Mail Transfer Protocol) SMTP is the backbone protocol for Email and is how most Email is transferred between servers on the Internet. Its also the protocol POP and IMAP clients use to send email. Because SMTP is a protocol (meaning its a set of rules defined in a RFC) rather then an API to use it you need to use a library that will give you some objects that you can code against that will then generated the necessary communication that follows the protocol rules. Some example of these are CDOSys, and System.NET.Mail. From an Exchange technical point of view when you submit a message via SMTP your submitting it directly into the Transport Pipeline so i...
Pushing the Envelope in Messaging and Office 365 Development