If you are experiencing issues with incoming email not being received in Virtualmin, there are several potential causes and solutions:
Check the mail server logs: The first step in troubleshooting this issue is to check the mail server logs for any errors or indications of a problem. This can help you identify any specific issues that are preventing email from being received.
Check your DNS settings: Make sure that your DNS settings are configured correctly, including your MX records. Incorrect DNS settings can prevent email from being delivered to your server.
Check for firewall or routing issues: Make sure that your firewall or router is not blocking incoming email traffic. Also check that the ports that are used for email (typically 25, 465, and 587) are open.
Check your email client settings: If you are using a web-based email client, make sure that your login credentials and server settings are correct.
Check your email filters: Make sure that your email filters are not accidentally blocking incoming email.
Check your anti-spam settings: Make sure that your anti-spam settings are not too aggressive and blocking legitimate email.
Check for email loop: Make sure that there is no email loop happening in your email server. This can happen if two servers are configured to forward email to each other, resulting in an infinite loop.
Check for email quota: Make sure that your mailbox is not full and that you have enough space to receive new emails.
Check for email client compatibility: Make sure that the email clients that are sending email to your server are compatible with your email server.
Check with your email service provider: If you’re still having issues, it may be worth checking with your email service provider to see if they are aware of any problems that could be impacting your email.
It’s worth noting that these are just some general troubleshooting steps, and the specific cause of your issue may vary depending on your specific setup.