On 08/01/2010 09:29 AM, Wietse Venema wrote: > Mike Morris: >> Hi, >> >> I'm working on a mail server deployment that will only have one server >> for MX and SASL submission purposes. Generally I like to have separate >> Postfix instances to handle a specific task. In this case I'm running >> in to problems when the submission instance uses the same IP address as >> the MX instance. (Due to a limited IP address pool there is currently >> only one routable IP address assigned to this server.) >> >> Using the submission instance to send a message to a recipient address >> for which the server is also the MX host triggers Postfix' loop >> detection. Mail for foreign addresses is relayed correctly. I realize >> this can be done easily enough without using multiple instances. Is >> there a way to work around this so that an MX instance and submission >> instance can share single IP address? I've gotten used to the queue, > > If you use different MTAs, then use different myhostname AND > different inet_interfaces settings. Otherwise it is just too easy > to screw up and have a high-speed mail system meltdown/explosion/etc. > > Postfix is not just about "secure" for some vague definition of > secure, it is about making a safe to use, so that it does not rip > off your arms and legs when you make a trivial mistake. > > Wietse
Fair enough. I'll see what can be done about a second IP address. -Mike
