Exchange 5.x will deque messages waiting for your domain over a dial-up connection.
To deque messages over a routed connection, you can schedule a batch file:
@echo off REM Cause dialup router to connect pingIf using a single host (multiple hosts are very slow), you can use Regedt32 to navigate to:
ping if not %ERRORLEVEL% EQU 0 exit REM If IMS not started, start it. net start MSExchangeIMC REM use 3rd party retrieval program or REM FINGER your.domain.com@ISP.Host.domainisp.com or REM use the AlwaysUseETRN registry value REM stop IMS, if you started it. net stop MSExchangeIMC exit
On the Edit menu, Add Value name AlwaysUseETRN, a type REG_DWORD value, and set the data to 1.
This will cause IMS to send an ETRN command to all ESMTP hosts it connects to,
if they advertise support for ETRN, and are listed in the routing table as configured for IMS.