(IOS) SMTP using SOCKS5, SOCKS4 Proxy

Demonstrates how to communicate with an SMTP server via a SOCKS4 or SOCKS5 proxy.

Download: Chilkat IOS (IPhone) Objective-C Libraries

NSMutableString *strOutput = [NSMutableString stringWithCapacity:1000];

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

//  Any string argument automatically begins the 30-day trial.
BOOL success;
success = [mailman UnlockComponent: @"30-day trial"];
if (success != YES) {
    [strOutput appendString: mailman.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    return;
}

//  To use a SOCKS4 or SOCKS5 proxy, simply set the following
//  properties prior to making any calls that communicate with
//  an SMTP server:
//  The SOCKS hostname may be a domain name or
//  IP address:
mailman.SocksHostname = @"www.mysocksproxyserver.com";
mailman.SocksPort = [NSNumber numberWithInt:1080];
mailman.SocksUsername = @"myProxyLogin";
mailman.SocksPassword = @"myProxyPassword";
//  Set the SOCKS version to 4 or 5 based on the version
//  of the SOCKS proxy server:
mailman.SocksVersion = [NSNumber numberWithInt:5];
//  Note: SOCKS4 servers only support usernames without passwords.
//  SOCKS5 servers support full login/password authentication.

//  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] autorelease];

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

//  Call SendEmail to connect to the SMTP server 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) {
    [strOutput appendString: mailman.LastErrorText];
    [strOutput appendString: @"\n"];
    self.mainTextField.stringValue = strOutput;
    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) {
    [strOutput appendString: @"Connection to SMTP server not closed cleanly."];
    [strOutput appendString: @"\n"];
}

[strOutput appendString: @"Mail Sent!"];
[strOutput appendString: @"\n"];

self.mainTextField.stringValue = strOutput;