(Swift 3,4,5...) Send HTML Email with Attachments

Demonstrates how to send an HTML email with file attachments.

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 mailman = CkoMailMan()!

    mailman.smtpHost = "smtp.my-starttls-mail-server.com"

    mailman.smtpUsername = "MY-SMTP-USERNAME"
    mailman.smtpPassword = "MY-SMTP-PASSWORD"

    mailman.startTLS = true
    mailman.smtpPort = 587

    // Create a new email object
    let email = CkoEmail()!
    email.subject = "Test SMTP API to Send HTML Email with Attachments"
    email.from = "Joe Programmer <joe@my-starttls-mail-server.com>"
    email.add(to: "Chilkat Support", emailAddress: "support@chilkatsoft.com")

    // Add a plain-text alternative body, which will likely never be seen.
    // (It is shown if the receiving email client is incapable of displaying HTML email.)
    email.addPlainTextAlternativeBody("This is a plain-text alternative body...")

    // Our HTML will include an image, so add the related image here.
    var contentIdStarfish: String? = email.addRelatedFile("qa_data/jpg/starfish.jpg")
    if email.lastMethodSuccess != true {
        print("\(email.lastErrorText!)")
        return
    }

    // The src attribute for the image tag is set to the contentIdStarfish:
    let sbHtml = CkoStringBuilder()!
    sbHtml.append("<html><body><p>This is an HTML email with an embedded image.</p>")
    sbHtml.append("<p><img src=\"cid:CONTENT_ID_STARFISH\" /></p></body></html>")
    var numReplacements: Int = sbHtml.replace("CONTENT_ID_STARFISH", replacement: contentIdStarfish).intValue

    email.addHtmlAlternativeBody(sbHtml.getAsString())

    // Finally, add some attachments to the email.
    // Add a file attachment.
    var success: Bool = email.addFileAttachment2("qa_data/pdf/fishing.pdf", contentType: "application/pdf")
    if success != true {
        print("\(email.lastErrorText!)")
        return
    }

    // Add an attachment where the content is contained in a string.
    var content: String? = "This is the content of the 2nd attached file."
    email.addStringAttachment("someText.txt", str: content)

    // Send the HTML email.
    success = mailman.send(email)
    if success != true {
        print("\(mailman.lastErrorText!)")
        return
    }

    success = mailman.closeSmtpConnection()
    if success != true {
        print("Connection to SMTP server not closed cleanly.")
    }

    print("HTML email with attachments sent!")

}