You don't have to make a HOSTS entry on the primary but I think you do on the secondary.
I haven't actually tested this to see if it fails if I don't but I assume the KB article is probably accurate: http://support.ipswitch.com/kb/IM-19980116-JB14.htm " This way, IMail will attempt to deliver any mail it receives for that domain to his machine (bypassing the MX records in DNS, which point to itself and can create a mail loop)." For ETRN purposes the same is true since you are going to need to issue ETRN <domain> and you want the <domain> translated to a specific IP which may or may not be the IP returned by DNS. Say you have MX1 which is primary and Mx2 which is secondary. MX1 is down or offline so mail now goes to MX2. Now mail destined for MX1 that is in MX2's Q needs to go to MX1 when MX1 is back on line. On the secondary server you don't really want the normal DNS checking and routing to occur though because the only place you ever want mail to go from the secondary is the primary. Thus you can use the HOSTS file to set what is in effect a static route from MX2 to MX1. For ETRN you may want a specific IP in fact that has nothing to do with normal translation for the domain. At any rate with IMAIL server whenever the primary comes back up or comes on line and within the Q timer delay the mail is automatically sent out to the primary as defined in hosts. I personally think this is an elegant solution. Sure you can force it to deliver with ETRN but at least you have the option. MS SMTP server (among others) doesn't do this. You have to force it to deliver to the primary with an ETRN <domain> command or one of the (4?) authorization methods with ATRN that MS SMtP server supports. Or at least that's my current opinion. Terry Fritts -----Original Message----- From: [EMAIL PROTECTED] [mailto:IMail_Forum- I don't understand what you're getting at here. There should be no need to edit the hosts file on either of the two SMTP servers, DNS lookups will resolve a FQDN to a IP address. Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
