SMTP Error 441 is a permanent or "5xx" error code issued by a mail server to indicate the rejection of an email message. This rejection occurs when the recipient's mailbox or email account is either non-existent or no longer active. The error denotes that the recipient's email address is invalid, leading to the inability to deliver the message.

What's Causing This SMTP Error 441:

SMTP Error 441 may result from various issues:

• Non-existent recipient: The email address provided in the "RCPT TO" command or the "To:" field of the email message does not correspond to a valid email account or mailbox.
• Invalid recipient domain: The recipient's email domain (e.g., example.com) either does not exist or has been retired.
• Deactivated or expired account: The recipient's email account may have been deactivated, suspended, or expired, rendering it unavailable for receiving emails.

How to Resolve SMTP Error 441 - Step-by-Step Solution:

To address SMTP Error 441, follow these steps:

• Verify recipient's email address: Confirm the correct spelling and completeness of the recipient's email address, ensuring it corresponds to a valid email account or mailbox.
• Check recipient domain: Ensure the recipient's email domain is operational, free of DNS (Domain Name System) issues, and is not retired or expired.
• Contact the recipient: If encountering SMTP error 441 persistently when sending emails to a specific recipient, reach out through an alternative method (e.g., phone) to verify the status of their email account. They may need to resolve account-related issues.

SMTP Error 441 Examples:

• "441 5.1.1 recipient@example.com: Recipient address does not exist."
• "441 5.4.5 recipient@example.com: Domain name not found. Check recipient domain."
• "441 5.7.0 recipient@example.com: Recipient's email account is deactivated. Email delivery cannot be completed."