Java

Fetch a POP3 Message's Raw MIME by UIDL

Demonstrates the Chilkat MailMan.FetchMimeBd method, which fetches an email from the POP3 server by UIDL and stores the raw MIME source bytes in a BinData. Chilkat clears the BinData before downloading. This example fetches one message's MIME into a BinData.

Background: Sometimes you want the message exactly as it arrived — the raw MIME bytes — rather than a parsed Email object, for example to archive it verbatim as a .eml file, forward it untouched, or hash it. Fetching into a BinData preserves every byte precisely, without any parsing or re-encoding that could alter the original.

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import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.MailMan;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates the MailMan.FetchMimeBd method, which fetches an email from the POP3 server
        // by UIDL and stores the raw MIME source bytes in a BinData.  Chilkat clears the BinData
        // before downloading.

        MailMan mailman = new MailMan();

        // Configure the POP3 server connection.
        mailman.setMailHost("pop.example.com");
        mailman.setMailPort(995);
        mailman.setPopSsl(true);
        mailman.setPopUsername("user@example.com");
        mailman.setPopPassword("myPassword");

        // Fetch the raw MIME of a specific message by UIDL into a BinData.
        BinData bdMime = new BinData();

        try {
            mailman.fetchMimeBd("0000000123abcdef", bdMime);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("MIME size (bytes) = " + bdMime.getNumBytes());

        // Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
        // connects and authenticates -- using the property settings above -- whenever a server
        // operation requires it.  Calling the explicit connect/authenticate methods can still be
        // helpful to determine whether a failure occurs while connecting or while authenticating.
    }
}