SMTP outbound load balancing

Hi,

we have the following configuration:

  • All servers in 1 DNN

  • servers physical located in the US

  • servers physical located in Europe

  • 2 inbound SMTP servers, 1 in the US mx=10 and 1 in Europe mx=20 for failover.

  • 2 outbound SMTP servers, 1 in the US and 1 in Europe

  • . foreign domain document

  • 2 SMTP connection documents: One SMTP connection doc from a server in the US and 1 SMTP connection doc from a server in Europe

Now the question:

We want all servers in Europe to route SMTP mail to the Internet via the outbound SMTP server in Europe and all servers in the US route SMTP mail via the outbound SMTP server in the US.

Our problem is that ALL Internet mail goes via de SMTP outbound server in the US because this server is alphabetically the first server in the list. Is their a possibility to route Internet E-mail for the European servers via the Europe SMTP outbound server?

Subject: SMTP outbound load balancing

hi please enable smtp mail routing along with mail routing on the basic tab [routing task field on the basic tab] of the server document …of the european server …make sure smtp is enabled as well in the configuration document of the european server …

then both u r european server as well as us server can send outbound mails

to my knowledge it doesn’t go by alphabetics to choose which server would do what task as long as it is properly configured

hope this answer help 's u

thanks

venki

Subject: RE: SMTP outbound load balancing

OOPs…didn’t read the problem good earlier

Subject: SMTP outbound load balancing

Yes you can easily achieve this.You are still using the ‘old style’ pre R5 SMTP connection document method. I would remove this, including the . foreign domain documents and SMTP mail routing from the server documents. Instead setup configuration documents for groups of servers, e.g. one for Europe, one for USA, separate ones if needs be for the 2 SMTP servers. In there specify the relay host as either the USA SMTP server, the Europe SMTP server or the actual relay, etc for the 2 SMTP servers configuration docs. You are also able to configure things so that you can either manually or automatically switch to the ‘other’ SMTP server if the first is unavailable for any reason.

Subject: RE: SMTP outbound load balancing

Implementing this senario, would it be possible to route mail to the relay server via Notes? If yes, how can I establish this?

Subject: SMTP outbound load balancing

That’s a major issue I have with Domino and routing. Domino cost routing has never worked properly (note, I have not tried this in 6.5.1 or .2). Your only recourse is to try and have Europe send to the European server at a cost of 1, with a backup connection the US at a cost of 2. Then if Europe goes down, it will fail over to the US because they will both have a cost of 2 and the US is alphabetically first. Going the other way will never fail over, as Domino does not increase the cost of routing on each failure. It only does it once, to 2. In that case, if the US servers tried to go to Europe at a cost of 2, it would never try Europe because the US is cost 2 as well, and it is first alphabetically.

Your other option is to setup some host names in DNS and try to put the servers behind that host name (aliases) with different costing on the DNS side. That’s always an option.

Subject: SMTP outbound load balancing

Yes. You either need to segment the domino server into different Notes Name Networks or use different mail domains for all the users. I think the NNN would be a better option. Have all the US servers in a US NN and the Europe in a EU NNN. Then one server in each of the NN can be marked to be the outbound SMTP.

Otherwise, you can have the servers configuration documents point the appropriate SMTP outbound server.

If you need more info feel free to email my email account on my profile.

HTH