By the end of this month, our mail servers will begin checking and reporting the delivery status of all messages that pass through our mail services. Any message that is accepted by our system as valid, but is rejected by the final destination as invalid, will be subject to one of the following actions:
1) If the domain is in "Default Deny" mode, the corresponding table entry in the valid user table that permitted the message will be automatically disabled.
2) If the domain is in "Default Allow" mode, it will be automatically changed to "Defer All" and our servers will stop accepting mail for the domain.
For domains using a global table:
1) A global mode "Deny" table will have the corresponding table entry disabled.
2) A global mode "Allow" table will be changed to "Defer" and our servers will stop accepting mail for any domain using the global table.
Domains in automatic learning mode will be ignored.
If any automated action is taken on a domain by the system, you will be notified at the Alert Email Address configured for your account (or primary address if no alert address is configured). If a domain is automatically placed into defer mode, you may correct the problem and changing it back to the appropriate mode.
This policy change to require a valid user table for mail domains was first announced in September 2005 and became effective in November 2005. In May of 2006, we added an inline recipient verification feature, however, this proved ineffective since many users are simply changing the valid user table settings to bypass the checks. Therefore, we are going to start actively checking and disabling domains that violate this policy.
If you have not correctly configured a valid user table for your domain, do so now. All account levels are subject to this policy. If you have any questions, please contact us.
Mail Handling Options:
September 2005 announcement:
May 2006 announcement: