EZA5647E

hlq

date time POTENTIAL
LOOP DETECTED USING IPMAILERNAME ipmailername
Explanation
 The IPMAILERNAME statement has been configured
in the hlq.SMTP.CONFIG data set. SMTP has resolved the IPMAILERNAME
statement and the only IP address in the IP address list is a home
IP address for the system currently running SMTP. This configuration
is not valid, and can cause mail to loop or to be delivered to the
wrong mailbox.
 In the message text: date
The date when the message is issued.
time
The time when the message is issued.
ipmailername
The fully qualified name of a mail server in the IP network. The
length of the string being displayed is limited to 100 characters.

System action
 There are two possible system actions when a
home IP address is the only address in the IP list: If the IPMAILERNAME statement has the parameter ALL configured,
SMTP terminates.
If the IPMAILERNAME statement has the parameter UNKNOWN configured,
SMTP continues. The mail becomes undeliverable.

Operator response
 No action is needed.

System programmer response
 Check that the IP mailer name is
correct. If the name is correct, then activate resolver traces in
SMTP to understand how SMTP is resolving the ipmailername value.
Remove the home IP address from the list of addresses associated with
the IPMAILERNAME in the DNS data base or local host tables. See  the
information about the SMTP RESOLVER trace in z/OS Communications Server: IP Diagnosis Guide.

User response
 Not applicable.

Problem determination
 Not applicable.

Source
 z/OS® Communications
Server TCP/IP: SMTP

Module
 SMTPRES

Routing code
 2, 10

Descriptor code
 4

Example
  The following
statement is coded in the hlq.SMTP.CONFIG data set. This statement
contains the error that the string MVS7 is also the name of the system
running the SMTP: IPMAILERNAME MVS7  ALL
The
following messages are generated after you start SMTP and the first
note is being processed.  When SMTP resolves the name MVS7 it will
have the same IP addresses as the home list for this system. Because
the ALL parameter is coded, all the mail will be forwarded. The mailer
cannot forward mail to itself, therefore, the SMTP is terminated: IEF695I START SMTP     WITH JOBNAME SMTP  IS ASSIGNED TO USER IBMUSER GROUP SYS1                                                 
$HASP373 SMTP     STARTED                                               
IEF403I SMTP - STARTED - TIME=14.20.40                                  
EZY1876I SMTP STACK FUNCTIONS STARTED WITH PARAMETER SMTP,PARM=,        
ERRFILE(SYSERR),NOSPIE/.                                                
IEA631I  OPERATOR USER1    NOW INACTIVE, SYSTEM=MVS7    , LU=L7201A     
EZA5647E 11/03/05 14:22:51 POTENTIAL LOOP DETECTED USING IPMAILERNAME   
MVS7.TCP.RALEIGH.IBM.COM                                                
EZY1877I SMTP STACK FUNCTIONS SHUTDOWN IS COMPLETE, RC = 0.             