(Swift) Transition from MailMan.MxLookup to Dns.Query

Provides instructions for replacing deprecated MxLookup method calls with the Chilkat Dns class.

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

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

func chilkatTest() {
    let mailman = CkoMailMan()!

    // ...
    // ...

    var emailAddr: String? = "joe@example.com"

    // ------------------------------------------------------------------------
    // The MxLookup method is deprecated:

    var domain: String? = mailman.mxLookup(emailAddr)
    if mailman.lastMethodSuccess == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    // ------------------------------------------------------------------------
    // Do the equivalent using the Chilkat DNS class

    let dns = CkoDns()!

    let json = CkoJsonObject()!

    // This gets all MX domains for an email address.  (Typically one domain.)
    // The preferred domain will be at index 0 (see below).
    var success: Bool = dns.query("MX", domain: emailAddr, answer: json)
    if success == false {
        print("\(dns.lastErrorText!)")
        return
    }

    var i: Int = 0
    var count_i: Int = json.size(ofArray: "answer.mx").intValue
    while i < count_i {
        json.i = i
        domain = json.string(of: "answer.mx[i].domain")
        print("\(domain!)")
        i = i + 1
    }


}