Creste Email using CRM 2011 Plug In

private void SendEmail(IOrganizationService service, Guid recieverUserId, Guid senderUserId, Guid regardingObjectId, string emailBody, string emailSubject)

{

Entity email = new Entity();
email.LogicalName = “email”;

//Set regarding object property (i.e. The entity record, which u want this email associated with)

EntityReference regardingObject = new EntityReference(“{entity_name}”, regardingObjectId);
email.Attributes.Add(“regardingobjectid”,regardingObject);

//Defining Activity Parties (starts)

EntityReference from = new EntityReference(“systemuser”, senderUserId);

EntityReference to = new EntityReference(“systemuser”,recieverUserId);

//Derive from party

Entity fromParty = new Entity(“activityparty”);
fromParty.Attributes.Add(“partyid”,from);

//Derive to party

Entity toParty = new Entity(“activityparty”);
toParty.Attributes.Add(“partyid”, to);

EntityCollection collFromParty = new EntityCollection();
collFromParty.EntityName = “systemuser”;
collFromParty.Entities.Add(fromParty);

EntityCollection collToParty = new EntityCollection();
collToParty.EntityName = “systemuser”;
collToParty.Entities.Add(toParty);

email.Attributes.Add(“from”,collFromParty);
email.Attributes.Add(“to”, collToParty);

//Defining Activity Parties (ends)

//Set subject & body properties
email.Attributes.Add(“subject”,emailSubject);
email.Attributes.Add(“description”, emailBody);

//Create email activity

Guid emailID = service.Create(email);

//Sending email

SendEmailRequest reqSendEmail = new SendEmailRequest();
reqSendEmail.EmailId = emailID;//ID of created mail
reqSendEmail.TrackingToken = “”;
reqSendEmail.IssueSend = true;

SendEmailResponse res = (SendEmailResponse)service.Execute(reqSendEmail);

}