1. 使用cocoapods安裝SKPSMTPMessage。
2. 簽訂協議
   
3. 程式碼
   

程式碼部分

@interface ViewController ()<SKPSMTPMessageDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    SKPSMTPMessage *mail = [[SKPSMTPMessage alloc] init];
    [mail setSubject:@"測試"
 
];  // 設定郵件主題
    [mail setToEmail:@"[email protected] "]; // 目標郵箱
    [mail setFromEmail:@"[email protected]"]; // 傳送者郵箱
    [mail setRelayHost:@"smtp.mxhichina.com"]; // 傳送郵件代理伺服器
    [mail setRequiresAuth:YES];
    [mail setLogin:@"[email protected]"]; // 傳送者郵箱賬號
    [mail setPass:@"xxxxxxxxx"]; // 傳送者郵箱密碼
 

    [mail setWantsSecure:YES];  // 需要加密
    [mail setDelegate:self];


    NSDictionary *plainPart = [NSDictionary dictionaryWithObjectsAndKeys:
                               @"text/plain",kSKPSMTPPartContentTypeKey,
                               @"This is a test message.",kSKPSMTPPartMessageKey,
                               @"8bit"
 
,kSKPSMTPPartContentTransferEncodingKey,nil];
    [mail setParts:@[plainPart]]; // 郵件首部欄位、郵件內容格式和傳輸編碼
    [mail send];

}

- (void)messageSent:(SKPSMTPMessage *)message
{
    NSLog(@"傳送成功%@", message);
}
- (void)messageFailed:(SKPSMTPMessage *)message error:(NSError *)error
{
    NSLog(@"傳送失敗message - %@\nerror - %@", message, error);
}