Sending email failed

[shxylgithub]

Error message: Unable to connect due to active rejection by the target computer.
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken) at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) at System.Threading.Tasks.ValueTask.ValueTaskSourceAsTask.<>c.<.cctor>b__4_0(Object state) --- End of stack trace from previous location --- at System.Threading.Tasks.TaskToAsyncResult.End(IAsyncResult asyncResult) at MailKit.Net.SocketUtils.SocketConnectState.OnEndConnect(IAsyncResult ar) --- End of stack trace from previous location --- at MailKit.Net.SocketUtils.ConnectAsync(String host, Int32 port, IPEndPoint localEndPoint, CancellationToken cancellationToken) at MailKit.Net.SocketUtils.ConnectAsync(String host, Int32 port, IPEndPoint localEndPoint, Int32 timeout, CancellationToken cancellationToken) at MailKit.MailService.ConnectNetworkAsync(String host, Int32 port, CancellationToken cancellationToken) at MailKit.Net.Smtp.SmtpClient.ConnectAsync(String host, Int32 port, SecureSocketOptions options, CancellationToken cancellationToken) at Elsa.Email.Services.MailKitSmtpService.SendMessage(MimeMessage message, CancellationToken cancellationToken) at Elsa.Email.Services.MailKitSmtpService.SendAsync(MimeMessage message, CancellationToken

[glime-ai[bot]]

The error message you're encountering indicates that the application is unable to establish a connection to the target computer, which in this context is likely a mail server. This can happen for several reasons, such as the mail server actively refusing the connection, network issues, incorrect port or host details, or firewall settings preventing the connection.

Given the context of Elsa workflows and the error message, it seems that the issue is occurring during an attempt to send an email using the MailKitSmtpService. Here are some steps you can take to troubleshoot and resolve the issue:

1. Check Host and Port: Ensure that the SMTP host and port configuration in your application settings are correct. The host should be the address of the SMTP server you're trying to connect to, and the port should match the port expected by the SMTP server (commonly 25, 465 for SSL, or 587 for TLS).

2. Firewall and Network: Verify that there are no firewall rules or network issues that are blocking the connection to the SMTP server. This could be on your local machine, within your network, or on the SMTP server's side.

3. Server Availability: Make sure that the SMTP server is up and running and that it is not rejecting connections. You can test this by using a tool like telnet or nc (netcat) to attempt a connection to the SMTP server on the specified port.

4. Authentication and Encryption: If the SMTP server requires authentication or a specific encryption method (like SSL/TLS), ensure that your application is configured to provide the necessary credentials and to use the correct encryption settings.

5. Rate Limiting or IP Blocking: Some SMTP servers have rate limiting or IP blocking in place to prevent abuse. If you're sending a lot of emails in a short period, or if there have been previous issues with the IP you're connecting from, the server might temporarily block your connections.

6. Check Application Logs: Review the application logs for any additional information that might indicate why the connection is being refused. There might be more detailed error messages that can help pinpoint the issue.

7. Elsa Workflow Configuration: If you're using Elsa workflows, ensure that the SMTP activity is configured correctly within your workflow. Double-check the settings for host, port, credentials, and any other relevant parameters.

If you continue to experience issues after checking these points, you may need to contact your SMTP service provider for further assistance or check if there are any known issues with their service.

This comment was generated by Glime.