Messages - Spam Checking

Checking for Spam

aspNetIMAP uses the DNS black list (DNSbl) technique to check if a message is marked as spam. More information on this can be found here. The following example demonstrates checking a messages against Spamhaus and Sorbs DNSbl servers.

[C#]

IMAP4 imap = new IMAP4( "127.0.0.1" );
imap.Logger = new IMAPLog();

//if we have write permissions to the filesystem, we can write out a physical log file
imap.Logger.Path = "c:\\imap.log";

//if we don't have write permissions to a file, we can always keep an in-memory log
imap.Logger.InMemory = true;

imap.Username = "dave@blah.com";
imap.Password = "test";
imap.Login();

MailFolder inbox = imap.SelectInbox();

//load the BlackListChecker with 2 databases: spamhaus and sorbs
imap.BlackListChecker.AddDNSBlackList( "sbl-xbl.spamhaus.org", "127.0.0.2" );
imap.BlackListChecker.AddDNSBlackList( "dnsbl.sorbs.net", "127.0.0.2, 127.0.0.3, 127.0.0.4, 127.0.0.5, 127.0.0.6, 127.0.0.7, 127.0.0.8, 127.0.0.9, 127.0.0.10, 127.0.0.11, 127.0.0.12" );

//check to see if the first message is spam
bool result = inbox.MessageClient.IsBlackListedSpam( 1, IndexType.Ordinal, false );
Console.WriteLine( result );

//write out the log
Console.WriteLine( imap.Logger.ToString() );

imap.Disconnect();

Console.WriteLine( "Done" );
Console.ReadLine();

[VB.NET]

Dim imap As New IMAP4("127.0.0.1")
imap.Logger = New IMAPLog()

'if we have write permissions to the filesystem, we can write out a physical log file
imap.Logger.Path = "c:\imap.log"

'if we don't have write permissions to a file, we can always keep an in-memory log
imap.Logger.InMemory = True

imap.Username = "dave@blah.com"
imap.Password = "test"
imap.Login()

Dim inbox As MailFolder = imap.SelectInbox()

'load the BlackListChecker with 2 databases: spamhaus and sorbs
imap.BlackListChecker.AddDNSBlackList("sbl-xbl.spamhaus.org", "127.0.0.2")
imap.BlackListChecker.AddDNSBlackList("dnsbl.sorbs.net", "127.0.0.2, 127.0.0.3, 127.0.0.4, 127.0.0.5, 127.0.0.6, 127.0.0.7, 127.0.0.8, 127.0.0.9, 127.0.0.10, 127.0.0.11, 127.0.0.12")

'check to see if the first message is spam
Dim result As Boolean = inbox.MessageClient.IsBlackListedSpam(1, IndexType.Ordinal, False)
Console.WriteLine(result)

'write out the log
Console.WriteLine(imap.Logger.ToString())

imap.Disconnect()

Console.WriteLine("Done")
Console.ReadLine()

Checking to see if a message is spam

Checking for Spam