Objective-C

Fetch One POP3 Message by Message Number

Demonstrates the Chilkat MailMan.FetchOne method, which retrieves one message by POP3 message number and stores it in an Email object. The arguments are headerOnly, numBodyLines, the message number (the first message is 1), and the Email. The message remains on the server. This example fetches message 1 in full.

Background: POP3 message numbers are simple 1-based positions valid only for the current session. FetchOne is the way to pull a single message straight into an Email object (rather than a bundle) when you know its position — for example after listing the mailbox. Because numbers can shift between sessions, FetchByUidl is the stabler choice when a message must be identified reliably over time.

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Objective-C

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

BOOL success = NO;

//  Demonstrates the MailMan.FetchOne method, which retrieves one message by POP3 message
//  number and stores it in an Email object.  The arguments are headerOnly, numBodyLines, the
//  message number (the first message is 1), and the Email.  The message remains on the server.

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

//  Configure the POP3 server connection.
mailman.MailHost = @"pop.example.com";
mailman.MailPort = [NSNumber numberWithInt:995];
mailman.PopSsl = YES;
mailman.PopUsername = @"user@example.com";
mailman.PopPassword = @"myPassword";

//  Fetch message number 1 in full.  headerOnly=ckfalse (fetch the entire message).
//  Note: numBodyLines only applies when headersOnly is true (it sets how many lines of the
//  body to include along with the headers).  When headersOnly is false, the entire message
//  is fetched and numBodyLines is ignored.
CkoEmail *email = [[CkoEmail alloc] init];

success = [mailman FetchOne: NO numBodyLines: [NSNumber numberWithInt: 0] msgNum: [NSNumber numberWithInt: 1] email: email];
if (success == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

NSLog(@"%@%@",@"Subject: ",email.Subject);
NSLog(@"%@%@",@"From: ",email.From);

//  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
//  connects and authenticates -- using the property settings above -- whenever a server
//  operation requires it.  Calling the explicit connect/authenticate methods can still be
//  helpful to determine whether a failure occurs while connecting or while authenticating.