Extract Emails via 5 Most Popular Methods in Java

extract-messages-from-offline-storage.java

PersonalStorage pst = PersonalStorage.fromFile("storage.pst");
FolderInfo folder = pst.getRootFolder().getSubFolder("Inbox");

for (MessageInfo messageInfo : folder.enumerateMessages()) {

        MapiMessage msg = pst.extractMessage(messageInfo);
    }

microsoft-graph-to-extract-messages.java

IGraphClient client = GraphClient.getClient(tokenProvider);
GraphMessageInfoCollection messageInfoColl = client.listMessages(GraphKnownFolders.Inbox);

for (GraphMessageInfo messageInfo : messageInfoColl) {
    MapiMessage message = client.fetchMessage(messageInfo.getItemId());
}

retrieve-emails-via-imap.java

ImapClient client = new ImapClient("localhost", "user", "password");
client.setSecurityOptions(SecurityOptions.Auto);

try {
    ImapMessageInfoCollection messageInfoCol = client.listMessages();
	
	for (ImapMessageInfo messageInfo : messageInfoCol) {
	    MailMessage eml = client.fetchMessage(messageInfo.getUniqueId());
    }
} catch (Exception ex) {
    System.out.println(ex.getMessage());
} finally {
    client.dispose();
}

retrieve-emails-via-pop3.java

Pop3Client client = new Pop3Client("pop3.server.com", "username", "password");
client.setSecurityOptions(SecurityOptions.Auto);

try {
    Pop3MessageInfoCollection messageInfoCol = pop3Client.listMessages();
	
	for (Pop3MessageInfo messageInfo : messageInfoCol) {
	    MailMessage eml = client.fetchMessage(messageInfo.getSequenceNumber());
    }
} catch (Exception ex) {
    System.out.println(ex.getMessage());
} finally {
    client.dispose();
}

retrieve-messages-from-ews.java

IEWSClient client = EWSClient.getEWSClient("https://outlook.office365.com/ews/exchange.asmx", "UserName", "Password");
ExchangeMessageInfoCollection messageInfoCol = client.listMessages(client.getMailboxInfo().getInboxUri());

for (ExchangeMessageInfo msgInfo : (Iterable<ExchangeMessageInfo>) messageInfoCol) {
    String strMessageURI = msgInfo.getUniqueUri();

    MailMessage eml = client.fetchMessage(strMessageURI);
}