iProgramIt iProgramIt - 6 months ago 318
Swift Question

Sending Mailcore2 Plain Emails in Swift

I've recently incorporated MailCore2 into my Objective-C project, and it has worked perfectly. Now, I am in the process of transitioning the code within the app to Swift. I have successfully imported the MailCore2 API into my swift project, but I see no documentation (Google search, libmailcore.com, github) on how to turn the following working Objective-C code into Swift Code:

MCOSMTPSession *smtpSession = [[MCOSMTPSession alloc] init];
smtpSession.hostname = @"smtp.gmail.com";
smtpSession.port = 465;
smtpSession.username = @"matt@gmail.com";
smtpSession.password = @"password";
smtpSession.authType = MCOAuthTypeSASLPlain;
smtpSession.connectionType = MCOConnectionTypeTLS;

MCOMessageBuilder *builder = [[MCOMessageBuilder alloc] init];
MCOAddress *from = [MCOAddress addressWithDisplayName:@"Matt R"
MCOAddress *to = [MCOAddress addressWithDisplayName:nil
[[builder header] setFrom:from];
[[builder header] setTo:@[to]];
[[builder header] setSubject:@"My message"];
[builder setHTMLBody:@"This is a test message!"];
NSData * rfc822Data = [builder data];

MCOSMTPSendOperation *sendOperation =
[smtpSession sendOperationWithData:rfc822Data];
[sendOperation start:^(NSError *error) {
if(error) {
NSLog(@"Error sending email: %@", error);
} else {
NSLog(@"Successfully sent email!");

Does anyone know how to successfully send an email in Swift using this API? Thanks in advance to all who reply.


Here's how I did it:

Step 1) Import mailcore2, I'm using cocoapods

pod 'mailcore2-ios'

Step 2) Add mailcore2 to your bridging header: Project-Bridging-Header.h

#import <MailCore/MailCore.h>

Step 3) Translate to swift

var smtpSession = MCOSMTPSession()
smtpSession.hostname = "smtp.gmail.com"
smtpSession.username = "matt@gmail.com"
smtpSession.password = "xxxxxxxxxxxxxxxx"
smtpSession.port = 465
smtpSession.authType = MCOAuthType.SASLPlain
smtpSession.connectionType = MCOConnectionType.TLS
smtpSession.connectionLogger = {(connectionID, type, data) in
    if data != nil {
        if let string = NSString(data: data, encoding: NSUTF8StringEncoding){
            NSLog("Connectionlogger: \(string)")

var builder = MCOMessageBuilder()
builder.header.to = [MCOAddress(displayName: "Rool", mailbox: "itsrool@gmail.com")]
builder.header.from = MCOAddress(displayName: "Matt R", mailbox: "matt@gmail.com")
builder.header.subject = "My message"
builder.htmlBody = "Yo Rool, this is a test message!"

let rfc822Data = builder.data()
let sendOperation = smtpSession.sendOperationWithData(rfc822Data)
sendOperation.start { (error) -> Void in
    if (error != nil) {
        NSLog("Error sending email: \(error)")
    } else {
        NSLog("Successfully sent email!")

Note You might be needing a special app password for your google account. See https://support.google.com/accounts/answer/185833