ServerBuddies Support Blog

Mail Error message: Error 550 The recipient cannot be verified

On servers running cPanel, some times it is found that mail sent to valid users is bounced back by the mail server.

The bounce back messages will be similar to the following.

If the email account does indeed exist, then it is need to run the following commands to correct the issue.

Also check the /etc/localdomains file and verify that the domain name is present. Also verify that the DNS line in the /var/cpanel/user/username contains the domain as well.

Tags: Error 550, Mail Error message

DNS load balancer

Load balancing via DNS is achieved by assigning more than one IP address to the same name. For example, to balance the load on http requests for the site example.com, we would add more than one IP address, say 3, to the site. So the site can be accessed with any of the IP address.

The order in which the nameserver answers the dns query for that site is configured by setting ‘rrset-order’ in named.conf file.

For example, the configuration will return A records in round-robin order.

Other options are,
fixed - returns A record in the order they are defined in the zone file
random - returns A record in some random order

Tags: balancer, DNS load

/etc/rndc.key:1: configuring key ‘rndc-key’: bad base64 encoding

This error is due to the mismatch of the secret key in /etc/rndc.conf and the include file /etc/rndc.key. Both the keys should be the same.

After copying the secret key from the file /etc/rndc.conf to /etc/rndc.key, named can be restarted successfully.

Now named status can be checked

Domain Name Status Codes for .org, .biz, .us, .info and .name

These are the 15 domain name status codes used for ORG, BIZ, US, INFO, and NAME domains:

CLIENT_DELETE_PROHIBITED
The registrar has locked the domain so that it cannot be deleted.

SERVER_DELETE_PROHIBITED
The registry has locked the domain so that it cannot be deleted.

CLIENT_HOLD
The registrar has placed the domain on hold, and it cannot be used.

SERVER_HOLD
The registry has placed the domain on hold, and it cannot be used.

CLIENT_RENEW_PROHIBITED
The registrar has locked the domain so that it cannot be renewed.

SERVER_RENEW_PROHIBITED
The registry has locked the domain so that it cannot be renewed.

CLIENT_TRANSFER_PROHIBITED
The registrar has locked the domain so that it cannot be transferred to another registrar.

SERVER_TRANSFER_PROHIBITED
The registry has locked the domain so that it cannot be transferred to another registrar.

CLIENT_UPDATE_PROHIBITED
The registrar has locked the domain to prevent its settings from being changed.

SERVER_UPDATE_PROHIBITED
The registry has locked the domain to prevent its settings from being changed.

INACTIVE
The domain cannot be used because there is a problem with the name servers that were entered for it, or name servers have not been entered.

OK
The domain is active and can be used for Web sites, for email, or to register name servers.

PENDING_DELETE
The registration for the domain is about to be deleted by the registry, as when the domain expires.

PENDING_TRANSFER
The domain is in the process of being transferred from one registrar to another. It may not be modified during this period.

PENDING_VERIFICATION
The registry is in the process of creating the domain record.

Tags: .biz, .info, .org, .us, Domain, status codes

Domain name status codes for .com and .net

These are the 8 domain name status codes used for COM and NET domains :

ACTIVE

This is the normal state for a domain name. The domain is functional and can be renewed. Domains that are active can be used for Web sites, for email, or to register name servers. The domain will be included in the zone if the domain has been delegated to at least one name server.

REGISTRAR-HOLD

The domain has been placed on hold by the registrar and cannot be used. The domain can not be modified or deleted. The domain has been expired but can be renewed without a penalty fee. The domain will not be included in the zone.

REGISTRY-HOLD

The domain has been placed on hold by the registry and cannot be used. The domain will not be included in the zone until it’s renewed. REGISTRY HOLD status lasts for a period of 40 calendar days after the day the domain has expired.

REGISTRAR-LOCK

The registrar, often at the request of the domain registrant, has locked down the domain so that its settings cannot be modified. The domain can be renewed. The domain will be included in the zone.

REGISTRY-LOCK

The registry has locked down the domain so that its settings cannot be modified or deleted by the registrar. The domain can be renewed.

RedemptionPeriod

The domain has expired and the registry is waiting for 30 days as a precautionary measure before releasing it. The domain can not be modified or purged; it can only be restored which would require the domain owner to pay a redemption/penalty fee as well as the renewal fee to renew the domain. Any other registrar requests to modify or otherwise update the domain will be rejected.

PendingRestore

The registry sets this status after a registrar requests restoration of a domain that is in REDEMPTIONPERIOD status. The domain will be included in the zone. Registrar requests to modify or update the domain will be rejected.

The domain will be held in this status while the registry waits for the registrar to provide required restoration documentation. The domain status will be set to ACTIVE only if the registrar provides documentation to the registry within 7 calendar days to confirm the restoration request.

PendingDelete

The domain expired 75 days ago and the registry is about to erase it. The registry sets this status after a domain has been set in REDEMPTIONPERIOD status and the domain has not been restored by the registrar. A domain remains in this status for five days before it is deleted. The domain will not be included in the zone.

Once in this status all registrar requests to modify or otherwise update the domain will be rejected. Once purged, the domain will be available to the public for registration.

Tags: .com, .net, Domain name, status codes