通过密件抄送发送邮件时 MailCore 中的错误

Posted 2023-03-15

【中文标题】通过密件抄送发送邮件时 MailCore 中的错误

【英文标题】：Bug in MailCore when sending mail through bcc

【发布时间】：2012-08-21 16:05:58

【问题描述】：

发送带有以下收据的电子邮件时 至：人A 抄送：人B 密件抄送：personC

这三个人都会收到电子邮件。并且所有收到的电子邮件都会在收据字段中显示 personC。正如我们所知，不应显示密件抄送联系人 personC。为什么会发生这种情况？我正确地将CTCoreMessage 设置为to、cc 和bcc。这是MailCore 框架的错误吗？还是我错过了什么？

提前致谢！

以下是相关代码供大家参考

- (IBAction)buttonSendPressed:(id)sender

[self dismissViewControllerAnimated:YES completion:^
    CTCoreMessage *testMsg = [[CTCoreMessage alloc] init];
    NSMutableArray *mutArrTos = [NSMutableArray array]; // personA
    NSMutableArray *mutArrCcs = [NSMutableArray array];  // personB
    NSMutableArray *mutArrBccs = [NSMutableArray array];  // personC
    NSLog(@"toContactArr :%@",toContactArr);

    if (toContactArr.count>0) 
        for (NSDictionary *dict in toContactArr) 
            [mutArrTos addObject:[CTCoreAddress addressWithName:[dict valueForKey:@"name"] email:[dict valueForKey:@"email"]]];
        
        NSLog(@"mutArrRecipients : %@", mutArrTos);
        [testMsg setTo:[NSSet setWithArray:mutArrTos]];
    

    if (ccContactArr.count>0) 
        for (NSDictionary *dict in ccContactArr) 
            [mutArrCcs addObject:[CTCoreAddress addressWithName:[dict valueForKey:@"name"] email:[dict valueForKey:@"email"]]];
        
        NSLog(@"mutArrRecipients : %@", mutArrCcs);
        [testMsg setCc:[NSSet setWithArray:mutArrCcs]];
    


    if (bccContactArr.count>0) 
        for (NSDictionary *dict in bccContactArr) 
            [mutArrBccs addObject:[CTCoreAddress addressWithName:[dict valueForKey:@"name"] email:[dict valueForKey:@"email"]]];
        
        NSLog(@"mutArrRecipients : %@", mutArrBccs);
        [testMsg setBcc:[NSSet setWithArray:mutArrBccs]];
    

    [testMsg setFrom:[NSSet setWithObject:[CTCoreAddress addressWithName:@"222222" email:@"[e-mail]"]]];
    [testMsg setBody:self.textView.text];
    [testMsg setSubject:self.textField.text];

    DbManager *dbManager = [[DbManager sharedManager] switchDBWithFileName:DBNAME];
    User *user = [dbManager getAccount];
    NSString *account = user.account;
    NSString *pwd = user.password;
    NSString *emailType = user.email_type;
    NSLog(@"user: %@", user);

    NSLog(@"account: %@", account);
    NSLog(@"pwd: %@", pwd);
    NSLog(@"emailType: %@", emailType);


    NSError *error;
    BOOL success = [CTSMTPConnection sendMessage:testMsg server:@"smtp.gmail.com" username:@"[e-mail]" password:@"222222" port:25 useTLS:YES useAuth:YES error:&error];
    if (!success) 
        // Present the error
        NSLog(@"error: %@", error);
    else
        NSLog(@"CTSMTPConnection success");
    

];

【参考方案1】：

在阅读了 SMTP 协议之后。我已修改 CTCoreMessage.m 以删除标题中的密件抄送地址，如下所示。那么密件抄送地址就不会打印在接收方了。

CTCoreMessage.m

- (NSString *)render 
CTMIME *msgPart = myParsedMIME;

if ([myParsedMIME isKindOfClass:[CTMIME_MessagePart class]]) 
    /* It's a message part, so let's set it's fields */
    struct mailimf_fields *fields;
    struct mailimf_mailbox *sender = (myFields->fld_sender != NULL) ? (myFields->fld_sender->snd_mb) : NULL;
    struct mailimf_mailbox_list *from = (myFields->fld_from != NULL) ? (myFields->fld_from->frm_mb_list) : NULL;
    struct mailimf_address_list *replyTo = (myFields->fld_reply_to != NULL) ? (myFields->fld_reply_to->rt_addr_list) : NULL;
    struct mailimf_address_list *to = (myFields->fld_to != NULL) ? (myFields->fld_to->to_addr_list) : NULL;
    struct mailimf_address_list *cc = (myFields->fld_cc != NULL) ? (myFields->fld_cc->cc_addr_list) : NULL;
//  struct mailimf_address_list *bcc = (myFields->fld_bcc != NULL) ? (myFields->fld_bcc->bcc_addr_list) : NULL;
    clist *inReplyTo = (myFields->fld_in_reply_to != NULL) ? (myFields->fld_in_reply_to->mid_list) : NULL;
    clist *references = (myFields->fld_references != NULL) ? (myFields->fld_references->mid_list) : NULL;
    char *subject = (myFields->fld_subject != NULL) ? (myFields->fld_subject->sbj_value) : NULL;

    //TODO uh oh, when this get freed it frees stuff in the CTCoreMessage
    //TODO Need to make sure that fields gets freed somewhere
//  fields = mailimf_fields_new_with_data(from, sender, replyTo, to, cc, bcc, inReplyTo, references, subject);
    fields = mailimf_fields_new_with_data(from, sender, replyTo, to, cc, NULL, inReplyTo, references, subject);


    [(CTMIME_MessagePart *)msgPart setIMFFields:fields];

return [myParsedMIME render];

【参考方案2】：

看起来问题出在框架本身，因为框架没有显示任何表明密件抄送地址将被隐藏的信息

这只是表明可以将消息设置为密件抄送、抄送和收件人。

我已经将框架挖了 2 英尺，但没有发现任何关于密件抄送的信息表明它将隐藏在接收端...

【讨论】：

我们中国人经常挖3尺XD

我修复了这个错误，请检查我的答案。