Outlook连接缓慢，“无法建立与服务器的稳定连接”。使用MailCore2

Question

我试图从outlook中获取所有邮件标题，我成功登录该帐户并调用[session fetchAllFoldersOperation]，即使抓取邮件也能正常工作。

我当时要求批量为50的所有标题。 我接收批处理消息非常慢，一些请求丢失。 我收到＆＃34;无法建立到服务器的稳定连接。错误＆＃34; 这只发生在outlook中，我对gmail或yahoo没有任何问题。

这是我的会话配置。

self.username = username;
self.password = password;
self.hostname = ^ NSString *(SCMMailProvider provider) {
    if (provider == SCMServiceProviderGmail) {
        return @"imap.gmail.com";
    } else if (provider == SCMServiceProviderHotmail) {
        return @"imap-mail.outlook.com";
    } else if (provider == SCMServiceProvideriCloud) {
        return @"imap.mail.me.com";
    } else if (provider == SCMServiceProviderYahoo) {
        return @"imap.mail.yahoo.com";
    }

    return nil;
}(provider);

if (provider == SCMServiceProvideriCloud || provider == SCMServiceProviderOther) {
    self.mailsFolder = kSCMMailFolderInbox;
    [self setAuthType:MCOAuthTypeSASLNone];
} else {
    [self setOAuth2Token:password];
    [self setUsername:username];
    if (provider == SCMServiceProviderHotmail) {
        [self setAuthType:MCOAuthTypeXOAuth2Outlook];
        self.mailsFolder = kSCMMailFolderInbox;
    } else if (provider == SCMServiceProviderGmail) {
        [self setAuthType:MCOAuthTypeXOAuth2];
        self.mailsFolder = kSCMGmailAllMessagesFolder;
    }
}

MCOIMAPFetchMessagesOperation *fetchOp = [self fetchMessagesByNumberOperationWithFolder:self.mailsFolder
                                                                            requestKind:MCOIMAPMessagesRequestKindStructure | MCOIMAPMessagesRequestKindHeaders
                                                                                numbers:uidSet];
[fetchOp start:^(NSError *messageFetchingError, NSArray *msgs, MCOIndexSet *vanished) {
}