EZA5201I

date time Rcpt to unknown
host: host
Explanation
 An RCPT TO: command was issued to the indicated
host machine, and the SMTP server received a negative reply from a
Domain Name Server. If the SMTP server is not using a Domain Name
Server, the server could not find the indicated host name in the site
tables.

System action
 SMTP continues.

Operator response
 No action is needed.

System programmer response
 If the host name exists, check the
Domain Name Server or site tables for configuration errors, and resend
the mail message.

Module
 SMTPRES

Procedure name
  ProcessRQR 