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Error Codes

Leslie Schwankl
  • Updated

‘403 forbidden’ error code

  • 25 or more failed logins within 24 hours to trigger lockout
  • multiple devices could be using the same IP address (i.e. coffee shop, workplace)
  • when block has been removed, attempts reset to 0 meaning 25 more failed logins are needed to lock IP again

403 Forbidden – you don't have permission to access this resource is an HTTP status code that occurs when the web server understands the request but can't provide you additional access. It can happen when you visit an empty website directory or a specific page that has a permission error.

  • Too many failed login attempts makes it appear as a robot
  • Block would need to be removed from account by K-BID
  • This could have to do with IP address overlap between accounts

K-BID blocks IPs now if they have an excessive number of failed login attempts. This helps to prevent brute force attacks on accounts by humans and bots. Blocked IPs can be found, with a note on why the IP was blocked, by following the IP Blacklist link on the Admin dashboard.

https://www.k-bid.com/dashboard/ip-blacklist

 

When they are blocked for too many login attempts, you can correlate that to entries in the Event Log on the Bidder Detail page.

 

When somebody mentions a "403 error page" they are usually on the IP blacklist. What we are doing is showing a generic error page that means "permission denied" - assumption being these blocks are due to abuse.

 

404 error or 'page not found' error

This is a Hypertext Transfer Protocol standard response code that indicates the server was unable to find what was requested. This message may also appear when the server is not willing to disclose the requested information or when the content has been deleted.

How to Fix the 404 Not Found Error
  1. Retry the web page by pressing F5, clicking/tapping the refresh/reload button, or trying the URL from the address bar again. ...
  2. Check for errors in the URL. ...
  3. Move up one directory level at a time in the URL until you find something. ...
  4. Search for the page from a popular search engine.

 

'498/499 error'

This error basically means domain not setup to receive.

Let's review this example: "498/499 No MX for yahoo.comm."  In the Logs, you'll see this error actually consists of two fields:  

  • delivery-status.code: 498/499
  • delivery-status.description: No MX for yahoo.comm

The underlying cause of the error is always DNS-specific.  For this example, the domain yahoo.comm does not have any MX records assigned; it's a non-existent domain.  When a domain lacks MX records, email servers do not know where to send emails to for that domain. There are tools available such as dig, MXToolbox, and WhatsMyDNS that can verify what DNS records (if any) are configured for a domain.  

The primary reason a domain might be lacking MX records is that the domain simply doesn't exist. In our example above, the domain was mistyped as yahoo.comm rather than yahoo.com at some point during the email registration process for this recipient; this is part of why a double opt-in policy is so important. 

Less commonly, there are two other reasons a domain may be lacking MX records: either a domain's DNS provider is experiencing an incident (as in, a temporary misconfiguration), or the domain's owner(s) has configured the MX records incorrectly (if at all).  The former scenario will virtually always be a temporary setback; just an incident, resolved shortly. However, concerning the latter scenario, it is less certain as to if and when it will be resolved, since the domain's owner(s) must first become aware of the misconfiguration before they can then correct the misconfiguration.

 

'550 error'

The error message"550 5.5. 0 Requested action not taken: mailbox unavailable" that you are getting is a bounce message that could be due to:

  • The e-mail address that you're sending to doesn't exist.
  • There's a problem with your recipients account.
  • Your recipient may have too many messages and the server hosting it isn't accepting any more
  • The email you sent was blocked by the recipient's email hosting server, and returned to you

 

'554 error'

The account doesn't exist, is closed or never existed.

The Yahoo account that you're trying to send to doesn't exist.  We recommend that you contact the recipient directly to confirm their correct email address.

Why Yahoo Email Addresses Suddenly Hard Bounce:

Yahoo occasionally disable email addresses that haven't been signed into for 12 months or more.

 

Yahoo email address 

Yahoo will at times block emails if they feel the sender is spam.

 

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