Member Avatar for mutaharpk

when i send email below address i got this message.(several time)

1)Delivery to the following recipient failed permanently:

 northstate@bigpond.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain bigpond.com by extmail.bigpond.com. [61.9.189.122].

The error that the other server returned was:
550 5.1.1 <northstate@bigpond.com> recipient rejected. IB603a

2)Delivery Status Notification (Failure)
The following message to <andrew@aztecblades.com> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'sorry, no mailbox here by that name (#5.1.1)'

3)Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error. The following address
failed:

"northstatetownsville@bigpond.com":
SMTP error from remote server after RCPT command:
host: extmail.bigpond.com
5.1.1 <northstatetownsville@bigpond.com> recipient rejected. IB603a

can anyone help me how to solve this.

Edited by pritaeas because: Moved.
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  • Latest Post Latest Post by CimmerianX

Dani AI

Generated

reported repeated permanent bounces; and correctly observed the remote servers are rejecting the recipient addresses. When a remote mail server refuses a recipient, the usual causes are simple: an incorrect spelling, a mailbox that has been removed or renamed, an outdated mailing-list entry, or a forwarding/alias problem on the recipient side.

Practical checks in order of effort:

  • Verify the full address spelling (local part and domain) against a known good source (website, business card, phone/IM contact).
  • Confirm the mailbox still exists by contacting the person by another channel or asking their email admin.
  • If the address is in a group/list, check that the list was updated recently.

Quick technical tests that help narrow the cause:

  • Confirm the domain has mail servers (MX records) and that those hosts are reachable. From a shell:
    dig MX recipientdomain.com
nslookup -type=mx recipientdomain.com
  • If possible, test acceptance directly against the mail host (many providers block port 25, so this may not always work):
    telnet mx.host.name 25
EHLO local.example
MAIL FROM:<tester@local.example>
RCPT TO:<recipient@recipientdomain.com>

    The RCPT response will indicate whether the server accepts that mailbox.

Next steps and notes:

  • If the remote server consistently reports the mailbox as unknown, the corrective actions are to correct the address or get the recipient (or their provider) to restore the mailbox. When contacting the recipient’s ISP/admin, include the full bounce text and original headers so they can trace which server issued the rejection.
  • If many addresses or many recipients on one domain are failing in the same way, involve the recipient-side administrator; if failures are across many different domains, focus on address correctness and any sender-side reputation issues.

As and pointed out, start with verifying the address itself — it’s the most common fix.

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Member Avatar for pritaeas

It says andrew@aztecblades.com doesn't exists, send to the right address.

Member Avatar for CimmerianX

Yep - right here:
The following message to <andrew@aztecblades.com> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'sorry, no mailbox here by that name (#5.1.1)'

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