SMTP PROD ENVIRONMENT ISSUE SSL or TLS Connection / TIMEOUT

Help Orchestrator
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1

Hello Team,

SMTP Email works fine in DEV environment but having issues in PROD AWS.
Was able to test and establish the smtp server connection on the Machine but when I try to run the process using Assistant. I see the following ERROR

*Info: An error occurred while attempting to establish an SSL or TLS connection.
The server’s SSL certificate could not be validated for the following reasons:
• The server certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.
• The revocation function was unable to check revocation because the revocation server was offline.
• An intermediate certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.
• The revocation function was unable to check revocation because the revocation server was offline.
RemoteException wrapping MailKit.Security.SslHandshakeException: An error occurred while attempting to establish an SSL or TLS connection.

The server’s SSL certificate could not be validated for the following reasons:
• The server certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.

• The revocation function was unable to check revocation because the revocation server was offline.

• An intermediate certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.

• The revocation function was unable to check revocation because the revocation server was offline.

—> RemoteException wrapping System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
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, Task1 promise, Boolean requiresSynchronization)
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at MailKit.Net.Smtp.SmtpClient.d__100.MoveNext() in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:line 1388
— End of inner exception stack trace —
at MailKit.Net.Smtp.SmtpClient.d__100.MoveNext() in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:line 1414
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at UiPath.Mail.MailServiceFactory.CreateMailKitService(EmailProtocol protocol, String server, Int32 port, UserSettings userSettings, SecureSocketOptions options, Int32 timeout, CancellationToken cancellationToken)
at UiPath.Mail.MimeMailService.SendSMTPMail(MimeMessage mimemessage, UserSettings userSettings, ServerSettings serverSettings, SecureSocketEncryption secureConnection, CancellationToken cancellationToken, Boolean authenticateFirst)
at UiPath.Mail.MimeMailService.SendSMTPMail(MailMessage mailMessage, UserSettings userSettings, Receiver receiver, ServerSettings serverSettings, SecureSocketEncryption secureConnection, List`1 attachments, CancellationToken ct, Boolean isNewMessage, String body)
at UiPath.Mail.SMTP.Activities.SendMail.<>c__DisplayClass56_0.b__0()
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at UiPath.Mail.SMTP.Activities.SendMail.d__56.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at UiPath.Mail.Activities.Extensions.TaskExtensions.d__2.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at UiPath.Mail.Activities.SendMailActivity.d__43.MoveNext()
— End of stack trace from previous location where exception was thrown —
at UiPath.Shared.Activities.AsyncTaskCodeActivityImplementation.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)
at UiPath.Shared.Activities.AsyncTaskCodeActivity.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)
at System.Activities.AsyncCodeActivity.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)
at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

2

Have you checked with your security team? This is a certificate issue not a UiPath issue.

3

This was forwarded to the security team as well. Haven’t heard any feed back yet.