/// <summary>
/// Raises <b>MailFrom</b> event.
/// </summary>
/// <param name="from">MAIL FROM: value.</param>
/// <param name="reply">Default SMTP server reply.</param>
/// <returns>Returns SMTP server reply what must be sent to the connected client.</returns>
private SMTP_Reply OnMailFrom(SMTP_MailFrom from,SMTP_Reply reply)
{
if(this.MailFrom != null){
SMTP_e_MailFrom eArgs = new SMTP_e_MailFrom(this,from,reply);
this.MailFrom(this,eArgs);
return eArgs.Reply;
}
return reply;
}
/// <summary>
/// Is called when SMTP server session gets MAIL command.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">Event data.</param>
private void m_pSmtpServer_Session_MailFrom(object sender,SMTP_e_MailFrom e)
{
if(m_SMTP_RequireAuth && !e.Session.IsAuthenticated){
e.Reply = new SMTP_Reply(530,"5.7.0 Authentication required.");
return;
}
// Block blank domain(user@) email addresses.
if(e.MailFrom.Mailbox.IndexOf('@') != -1 && e.MailFrom.Mailbox.Substring(e.MailFrom.Mailbox.IndexOf('@') + 1).Length < 1){
e.Reply = new SMTP_Reply(501,"MAIL FROM: address(" + e.MailFrom + ") domain name must be specified.");
return;
}
try{
//--- Filter sender -----------------------------------------------------//
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type='ISmtpSenderFilter'";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
string assemblyFile = drViewFilter.Row["Assembly"].ToString();
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = m_pOwnerServer.StartupPath + "\\Filters\\" + assemblyFile;
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpSenderFilter filter = (ISmtpSenderFilter)filterInstance;
string error = null;
if(!filter.Filter(e.MailFrom.Mailbox,m_pApi,e.Session,out error)){
if(error != null){
e.Reply = new SMTP_Reply(550,error);
}
else{
e.Reply = new SMTP_Reply(550,"Sender rejected.");
}
return;
}
}
//----------------------------------------------------------------------//
}
catch(Exception x){
e.Reply = new SMTP_Reply(500,"Internal server error.");
Error.DumpError(this.Name,x,new System.Diagnostics.StackTrace());
}
}
