Event ID - 1070

Event Id1070
SourcePOP3 Connector
DescriptionAn attempt to relay e-mail to recipient <SMTPAddress> was made. The e-mail could not be delivered because the recipients e-mail domain name does not match any local e-mail domains.
Event InformationCAUSE :
This issue may occur when the Windows Small Business Server 2003 Connector for POP3 Mailboxes component downloads e-mail messages from a domain that is not found in the Microsoft Exchange Server 2003 organization default recipient policy. You may experience this issue when you configure a POP3 account with a domain that is outside your Exchange organization. 
For example, when the POP3 accounts use the e-mail domain address @externaldomain.com, and the Exchange default recipient policy does not include @externaldomain.com, the Connector for POP3 Mailboxes does not deliver the e-mail messages that it downloads from the Internet Service Provider (ISP). This issue may occur when the address on the POP3 e-mail message does not match any one of the addresses in the default recipient policy. In this case, the connector detects the message delivery as an attempt to relay the e-mail message to an external e-mail server and does not deliver the message. 
RESOLUTION :
To work around this issue, add the POP3 e-mail address as a secondary SMTP address in the Exchange default recipient policy, and then restart the Internet Information Service (IIS). Formore information click on the link given below.</p>
Reference Links Event 1070 is logged and e-mail messages are not delivered with the SBS 2003 Connector for POP3 Mailboxes

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