(Objective-C) SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy.

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#import <CkoMailMan.h>
#import <CkoEmail.h>

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

// The mailman object is used for sending and receiving email.
CkoMailMan *mailman = [[CkoMailMan alloc] init];

// To connect through an HTTP proxy, set the HttpProxyHostname
// and HttpProxyPort properties to the hostname (or IP address)
// and port of the HTTP proxy.  Typical port numbers used by
// HTTP proxy servers are 3128 and 8080.
mailman.HttpProxyHostname = @"www.my-http-proxy.com";
mailman.HttpProxyPort = [NSNumber numberWithInt:3128];

// Important:  Your HTTP proxy server must allow non-HTTP
// traffic to pass.  Otherwise this does not work.

// Set the SMTP server.
mailman.SmtpHost = @"smtp.chilkatsoft.com";

// Set the SMTP login/password (if required)
mailman.SmtpUsername = @"myUsername";
mailman.SmtpPassword = @"myPassword";

// Create a new email object
CkoEmail *email = [[CkoEmail alloc] init];

email.Subject = @"This is a test";
email.Body = @"This is a test";
email.From = @"Chilkat Support <support@chilkatsoft.com>";
BOOL success = [email AddTo: @"Chilkat Admin" emailAddress: @"admin@chilkatsoft.com"];

// Call SendEmail to connect to the SMTP server via the HTTP proxy and send.
// The connection (i.e. session) to the SMTP server remains
// open so that subsequent SendEmail calls may use the
// same connection.  
success = [mailman SendEmail: email];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

// Some SMTP servers do not actually send the email until 
// the connection is closed.  In these cases, it is necessary to
// call CloseSmtpConnection for the mail to be  sent.  
// Most SMTP servers send the email immediately, and it is 
// not required to close the connection.  We'll close it here
// for the example:
success = [mailman CloseSmtpConnection];
if (success != YES) {
    NSLog(@"%@",@"Connection to SMTP server not closed cleanly.");
}

NSLog(@"%@",@"Mail Sent!");