421 4.4.1 collect i o error on connection from mail.fwb.co.uk

A specific error message!

The error message "421 4.4.1 collect i o error on connection from mail.fwb.co.uk" is a SMTP error code, which is a standard way of reporting errors in email transmission.

Here's a breakdown of the error code:

• 421: This is the SMTP response code, which indicates a temporary failure.
• 4.4.1: This is the specific error code, which indicates a "resource shortage" or "connection refused" error.
• collect i o error on connection from mail.fwb.co.uk: This is a descriptive text that provides more information about the error. In this case, it suggests that there was a problem with the connection from the mail server mail.fwb.co.uk (which is likely a mail server for a company or organization).

The error is likely caused by a temporary issue with the mail server or the network connection between your email client and the mail server. Here are some possible causes:

1. Mail server overload: The mail server may be experiencing a high volume of email traffic, causing it to temporarily refuse connections.
2. Network connectivity issue: There may be a problem with the network connection between your email client and the mail server, causing the connection to be refused.
3. Mail server maintenance: The mail server may be undergoing maintenance or updates, causing temporary disruptions to email transmission.

To resolve the issue, you can try the following:

1. Wait and try again: Try sending the email again after a short period of time to see if the issue resolves itself.
2. Check your email client settings: Ensure that your email client is configured correctly and that you are using the correct mail server settings.
3. Contact your email administrator: If you are experiencing persistent issues, contact your email administrator or the IT department of the organization that manages the mail server to report the issue and seek assistance.