Introduction When sending outbound emails, you may receive a bounce-back error indicating that the recipient address is invalid or not found. A typical example of this error is: Error: A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: SMTP
Introduction When sending outbound emails, you may encounter an error indicating that the message size exceeds allowed limits. A common example of this error is: Error: A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: LMTP error after end
Introduction CAA (Certification Authority Authorization) records define which certificate authorities (CAs) are permitted to issue SSL certificates for your domain. If the CAA option is not visible in DirectAdmin’s DNS Management panel, it is likely disabled by default. Prerequisites SSH access to your server Root privileges Access to the DirectAdmin control panel Step-by-Step Guide Conclusion
Introduction When sending outbound emails, you may encounter an error message indicating that the email size exceeds the allowed limits. A typical example of this error is: Error: A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: SMTP error
Introduction The webmail search function may experience an error that causes it to malfunction, preventing certain email accounts from successfully searching through their emails. When this happens, users may see an error message such as: Error : Server Error (OK) Prerequisites You have root access to your cPanel server. You can connect via SSH and
Introduction Setting the correct PHP timezone is important to ensure that server-side processes—such as log timestamps, cron jobs, and time-based functions—operate according to your local time. In cPanel, this can be done easily using the MultiPHP INI Editor. Prerequisites Access to cPanel: Ensure you have a valid cPanel account with login credentials. Basic cPanel Knowledge:
Introduction In Windows Server environments, user accounts may become locked due to repeated failed login attempts or due to security policies that protect against unauthorized access. This guide provides step-by-step instructions to help you unlock both local and domain user accounts on a Windows Server. Below is an example of an error message that appears
Introduction Monitoring failed RDP login attempts is crucial for maintaining server security and identifying unauthorized access attempts. Windows Server keeps detailed logs of these events, which you can review using the built-in Event Viewer tool. This guide walks you through locating and interpreting these logs. Prerequisites Administrator access to the Windows Server Auditing enabled for
Introduction Secure File Transfer Protocol (SFTP) is a trusted method for securely transferring files between a local machine and a remote server. FileZilla, a widely-used open-source FTP client, supports SFTP connections using SSH key authentication. This guide walks you through the process of configuring FileZilla to connect using a private SSH key. Prerequisites FileZilla installed
Introduction Local port forwarding is a method of securely tunneling network traffic from your local machine to a remote server over an encrypted SSH connection. It allows you to access services, databases, or applications that are hosted on private networks or behind firewalls, without directly exposing them to the public internet. By forwarding a local