安装库 MailKit 并调用new SmtpClient().ConnectAsync(_settings.Server, _settings.Port, _settings.SSL);后，我收到此错误：
访问路径＆＃39; /var/www/.dotnet/corefx/cryptography/crls'被拒绝。
顺便说一句，我的项目位于 / media / ProjectName 。
我尝试执行此操作：sudo chmod -R 755 /var但我得到了权限错误。
这里是stacktrace：
at System.IO.UnixFileSystem.CreateDirectory（String fullPath）↵at System.IO.Directory.CreateDirectory（String path）↵在Internal.Cryptography.Pal.CrlCache.GetCachedCrlPath（X509Certificate2 cert，Boolean mkDir）↵at Internal。 Cryptography.Pal.CrlCache.DownloadAndAddCrl（X509Certificate2 cert，SafeX509StoreHandle store，TimeSpan＆amp; remainingDownloadTime）↵在Internal.Cryptography.Pal.CrlCache.AddCrlForCertificate（X509Certificate2 cert，SafeX509StoreHandle store，X509RevocationMode revocationMode，DateTime verificationTime，TimeSpan＆amp; remainingDownloadTime）↵在Internal。 Cryptography.Pal.OpenSslX509ChainProcessor.BuildChain（X509Certificate2 leaf，HashSet
的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）↵1 candidates, HashSet1已下载，HashSet1 systemTrusted, OidCollection applicationPolicy, OidCollection certificatePolicy, X509RevocationMode revocationMode, X509RevocationFlag revocationFlag, DateTime verificationTime, TimeSpan& remainingDownloadTime)↵ at Internal.Cryptography.Pal.ChainPal.BuildChain(Boolean useMachineContext, ICertificatePal cert, X509Certificate2Collection extraStore, OidCollection applicationPolicy, OidCollection certificatePolicy, X509RevocationMode revocationMode, X509RevocationFlag revocationFlag, DateTime verificationTime, TimeSpan timeout)↵ at System.Security.Cryptography.X509Certificates.X509Chain.Build(X509Certificate2 certificate)↵ at System.Net.Security.CertificateValidation.BuildChainAndVerifyProperties(X509Chain chain, X509Certificate2 remoteCertificate, Boolean checkCertName, String hostName)↵ at System.Net.Security.SecureChannel.VerifyRemoteCertificate(RemoteCertValidationCallback remoteCertValidationCallback)↵ at System.Net.Security.SslState.CompleteHandshake()↵ at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)↵ at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)↵ at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)↵ at System.Net.Security.SslState.ReadFrameCallback(AsyncProtocolRequest asyncRequest)↵--- End of stack trace from previous location where exception was thrown ---↵ at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()↵ at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)↵ at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)↵ at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)↵ at System.Threading.Tasks.TaskFactory1.FromAsyncCoreLogic（IAsyncResult iar，Func2 endFunction, Action1 endAction，Task`1 promise，Boolean requiresSynchronization） ↵---从抛出异常的先前位置开始的堆栈跟踪结束---↵在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）↵在System.Ru在MailKit.MailService的MailKit.Net.Smtp.SmtpClient.Connect（字符串主机，Int32端口，SecureSocketOptions选项，CancellationToken cancellationToken）上的ntime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）＆＆lt;＆gt; c__DisplayClass41_0.b__0（） ↵在System.Threading.Tasks.Task.Execute（）↵---从抛出异常的先前位置开始的堆栈跟踪结束---↵在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）↵在System。 MyProject.Services.MessageService.d__4.MoveNext（）中的Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）↵---从抛出异常的上一个位置的堆栈跟踪结束--- System在System.Runtime.CompilerServices。 TaskAwaiter.ThrowForNonSuccess（任务任务）↵在MyProject.Services.MessageService.d__5.MoveNext（）
答案 0 :(得分：4)
Lex Li发布创建目录/var/www/.dotnet/corefx/cryptography/crls并授予www-data组权限（如果这是运行您服务的组）
sudo chgrp www-data /var/www/.dotnet/corefx/cryptography/crls
答案 1 :(得分：0)
我指的是guide。在kestrel-hellomvc.service文件中，用User = my-root-username替换了User = www-data，它工作正常。 希望它可以帮助某人。