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(Objective-C) IMAP STARTTLS (Explicit TLS/SSL)The StartTls property is set to force the Connect method to automatically convert an connection to TLS/SSL via the STARTTLS IMAP command. This is also known as "explicit TLS/SSL" as opposed to "implicit TLS/SSL". With implicit TLS/SSL, the IMAP client connects on the well-known IMAP TLS/SSL port 993 and the secure channel is immediately established. With explicit TLS/SSL, the IMAP client connects on the typical non-secure port (143 usually) and the converts the connection via the STARTTLS command. Note: This example requires Chilkat v11.0.0 or greater.
#import <CkoImap.h> #import <CkoMessageSet.h> #import <CkoEmailBundle.h> #import <CkoEmail.h> BOOL success = NO; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoImap *imap = [[CkoImap alloc] init]; // Indicate that STARTTLS should be used to convert // to a secure TLS/SSL connection: imap.StartTls = YES; imap.Port = [NSNumber numberWithInt:143]; // Connect to an IMAP server and convert the connection // to TLS/SSL via STARTTLS. success = [imap Connect: @"imap.example.com"]; if (success == NO) { NSLog(@"%@",imap.LastErrorText); return; } // The remainder of this example is the same as for // non-TLS/SSL... // Login success = [imap Login: @"myLogin" password: @"myPassword"]; if (success == NO) { NSLog(@"%@",imap.LastErrorText); return; } // Select an IMAP mailbox success = [imap SelectMailbox: @"Inbox"]; if (success == NO) { NSLog(@"%@",imap.LastErrorText); return; } // Get the message IDs of all the emails in the mailbox BOOL fetchUids = YES; CkoMessageSet *messageSet = [[CkoMessageSet alloc] init]; success = [imap QueryMbx: @"ALL" bUid: fetchUids msgSet: messageSet]; if (success == NO) { NSLog(@"%@",imap.LastErrorText); return; } // Fetch the emails into a bundle object: CkoEmailBundle *bundle = [[CkoEmailBundle alloc] init]; BOOL headersOnly = NO; success = [imap FetchMsgSet: headersOnly msgSet: messageSet bundle: bundle]; if (success == NO) { NSLog(@"%@",imap.LastErrorText); return; } // Loop over the bundle and display the FROM and SUBJECT of each. CkoEmail *email = [[CkoEmail alloc] init]; int i = 0; int numEmails = [bundle.MessageCount intValue]; while (i < numEmails) { [bundle EmailAt: [NSNumber numberWithInt: i] email: email]; NSLog(@"%@",email.From); NSLog(@"%@",email.Subject); NSLog(@"%@",@"--"); i = i + 1; } // Disconnect from the IMAP server. success = [imap Disconnect]; |
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