Objective-C

Verify Connectivity to the SMTP Server

Demonstrates the Chilkat MailMan.VerifySmtpConnection method, which tests whether a TCP/IP connection can be established with the configured SMTP server. It verifies connectivity only — it does not authenticate. This example configures the SMTP host and checks whether it can be reached.

Background: When a send fails, it helps to know where it broke. VerifySmtpConnection isolates the first hop — can the client even reach the server on the configured host and port, and complete the TLS handshake? A failure here points at networking, firewall, DNS, port, or certificate issues rather than credentials. Once connectivity is confirmed, VerifySmtpLogin tests the authentication step.

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Objective-C

#import <CkoMailMan.h>

//  Demonstrates the MailMan.VerifySmtpConnection method, which tests whether a TCP/IP
//  connection can be established with the configured SMTP server.  It verifies connectivity
//  only (it does not authenticate).

CkoMailMan *mailman = [[CkoMailMan alloc] init];

//  Configure the SMTP server connection.
mailman.SmtpHost = @"smtp.example.com";
mailman.SmtpPort = [NSNumber numberWithInt:465];
mailman.SmtpSsl = YES;

//  Test connectivity to the SMTP server.
BOOL connected = [mailman VerifySmtpConnection];

if (connected == YES) {
    NSLog(@"%@",@"Successfully connected to the SMTP server.");
}
else {
    NSLog(@"%@",@"Could not connect to the SMTP server.");
}