Objective-C

Fetch a POP3 Message's Raw MIME by UIDL

Demonstrates the Chilkat MailMan.FetchMimeBd method, which fetches an email from the POP3 server by UIDL and stores the raw MIME source bytes in a BinData. Chilkat clears the BinData before downloading. This example fetches one message's MIME into a BinData.

Background: Sometimes you want the message exactly as it arrived — the raw MIME bytes — rather than a parsed Email object, for example to archive it verbatim as a .eml file, forward it untouched, or hash it. Fetching into a BinData preserves every byte precisely, without any parsing or re-encoding that could alter the original.

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Objective-C

#import <CkoMailMan.h>
#import <CkoBinData.h>

BOOL success = NO;

//  Demonstrates the MailMan.FetchMimeBd method, which fetches an email from the POP3 server
//  by UIDL and stores the raw MIME source bytes in a BinData.  Chilkat clears the BinData
//  before downloading.

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 the raw MIME of a specific message by UIDL into a BinData.
CkoBinData *bdMime = [[CkoBinData alloc] init];

success = [mailman FetchMimeBd: @"0000000123abcdef" mimeData: bdMime];
if (success == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

NSLog(@"%@%d",@"MIME size (bytes) = ",[bdMime.NumBytes intValue]);

//  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.