(Objective-C) How to Copy IMAP Mail to another IMAP Server

Demonstrates how to copy the entire contents of an IMAP mailbox to another IMAP server.

Note: This example requires Chilkat v11.0.0 or greater.

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#import <CkoImap.h>
#import <CkoStringBuilder.h>

BOOL success = NO;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoImap *imapSrc = [[CkoImap alloc] init];

// Connect to our source IMAP server.
success = [imapSrc Connect: @"imap.example.com"];
if (success == NO) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

// Login to the source IMAP server
success = [imapSrc Login: @"admin@chilkatsoft.com" password: @"myPassword"];
if (success == NO) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

CkoImap *imapDest = [[CkoImap alloc] init];

// Connect to our destination IMAP server.
success = [imapDest Connect: @"mail.example-code.com"];
if (success == NO) {
    NSLog(@"%@",imapDest.LastErrorText);
    return;
}

// Login to the destination IMAP server
success = [imapDest Login: @"myLogin" password: @"myPassword"];
if (success == NO) {
    NSLog(@"%@",imapDest.LastErrorText);
    return;
}

// Select an IMAP mailbox on the source IMAP server
success = [imapSrc SelectMailbox: @"Inbox"];
if (success == NO) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

// After selecting a mailbox, the NumMessages property will
// be updated to reflect the total number of emails in the mailbox:
NSLog(@"%d",[imapSrc.NumMessages intValue]);

// The emails in the mailbox will always have sequence numbers
// ranging from 1 to NumMessages.

// This example will copy the first 10 messages using sequence numbers
CkoStringBuilder *sbMime = [[CkoStringBuilder alloc] init];
int seqNum;
for (seqNum = 1; seqNum <= 10; seqNum++) {
    [sbMime Clear];
    success = [imapSrc FetchSingleAsMimeSb: seqNum bUid: NO sbMime: sbMime];
    if (success == NO) {
        NSLog(@"%@",imapSrc.LastErrorText);
        return;
    }

    success = [imapDest AppendMimeWithFlagsSb: @"Inbox" sbMime: sbMime seen: NO flagged: NO answered: NO draft: NO];
    if (success == NO) {
        NSLog(@"%@",imapDest.LastErrorText);
        return;
    }

}

// Disconnect from the IMAP servers.
success = [imapSrc Disconnect];
success = [imapDest Disconnect];