(Swift 3,4,5...) How to Copy IMAP Mail to another IMAP Server

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

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let imapSrc = CkoImap()!

    // Connect to our source IMAP server.
    var success: Bool = imapSrc.connect("imap.someMailServer.com")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    // Login to the source IMAP server
    success = imapSrc.login("admin@chilkatsoft.com", password: "myPassword")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    let imapDest = CkoImap()!

    // Connect to our destination IMAP server.
    success = imapDest.connect("mail.example-code.com")
    if success != true {
        print("\(imapDest.lastErrorText!)")
        return
    }

    // Login to the destination IMAP server
    success = imapDest.login("myLogin", password: "myPassword")
    if success != true {
        print("\(imapDest.lastErrorText!)")
        return
    }

    // Select an IMAP mailbox on the source IMAP server
    success = imapSrc.selectMailbox("Inbox")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    // After selecting a mailbox, the NumMessages property will
    // be updated to reflect the total number of emails in the mailbox:
    print("\(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.
    // We'll leave it up to you to write code to copy
    // the entire sequence range in reasonable size chunks.
    var startSeqNum: Int = 1
    var msgCount: Int = 10

    var sa: CkoStringArray?
    sa = imapSrc.fetchSequence(asMime: startSeqNum, count: msgCount)
    if imapSrc.lastMethodSuccess != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    var i: Int
    for i = 0; i <= sa!.count.intValue - 1; i++ {
        success = imapDest.appendMime("Inbox", mimeText: sa!.getString(i))
        if success != true {
            print("\(imapDest.lastErrorText!)")
            return
        }

    }

    sa = nil

    // Disconnect from the IMAP servers.
    success = imapSrc.disconnect()
    success = imapDest.disconnect()

}