Objective-C

Delete a Set of POP3 Messages by UIDL

Demonstrates the Chilkat MailMan.DeleteUidlSet method, which marks the POP3 messages whose UIDLs are listed in a StringTable for deletion. Chilkat processes the UIDL set and sends a DELE command for each located message. This example deletes two messages by UIDL.

Background: When you already know exactly which messages to remove — by their stable UIDLs — DeleteUidlSet deletes them all in one call without first downloading them. It is the efficient counterpart to fetching-then-deleting: for example, after processing messages elsewhere, hand back just their UIDLs to clear them. The deletions are committed when the POP3 session ends (unless ImmediateDelete is set).

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Objective-C

#import <CkoMailMan.h>
#import <CkoStringTable.h>

BOOL success = NO;

//  Demonstrates the MailMan.DeleteUidlSet method, which marks the POP3 messages whose UIDLs
//  are listed in a StringTable for deletion.  Chilkat sends DELE for each located message.

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";

//  Build the set of UIDLs to delete.
CkoStringTable *uidls = [[CkoStringTable alloc] init];
[uidls Append: @"0000000123abcdef"];
[uidls Append: @"0000000124abcdef"];

//  Mark the messages for deletion.

success = [mailman DeleteUidlSet: uidls];
if (success == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

//  Unless the ImmediateDelete property is set to true, the messages are only marked for
//  deletion.  End the POP3 session (which sends the QUIT command) to commit the deletions.
success = [mailman Pop3EndSession];
if (success == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

NSLog(@"%@",@"Deleted the UIDL set from the POP3 server.");

//  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.