[ 
http://issues.apache.org/jira/browse/JAMES-358?page=comments#action_12317914 ] 

Stefano Bagnara commented on JAMES-358:
---------------------------------------

Ok, I think we should split this issue in 2 different issue.
I think the one about 5xx errors has already been resolved a month ago by Noel 
patches on RemoteDelivery.

I still think that we should add an option for the multihomed mx hosts.

The RFC states that this issue has been controversial so I think that adding an 
OPTIONAL flag to avoid the attempts on all the IPs of a single MX host would be 
a great thing. I would not change the standard behaviour and the "new" 
behaviour would still be RFC compliant.

Noel: can you confirm/update your "I disagree with this patch" removing 
considerations about the 5xx error that is already been resolved? I'm new to 
the "new feature" workflow for the apache projects: perhaps we need to vote 
about this?


> Too many RemoteDelivery attempts with many mx and many ip
> ---------------------------------------------------------
>
>          Key: JAMES-358
>          URL: http://issues.apache.org/jira/browse/JAMES-358
>      Project: James
>         Type: Bug
>   Components: Remote Delivery
>     Versions: 2.2.0
>     Reporter: Stefano Bagnara
>     Priority: Minor
>  Attachments: DNSServer.java.singleIPperMX.diff, 
> james-config.xml.singleIPperMX.diff
>
> Take a domain with 5 mx servers each one with 6 associated ips. James 
> currently try to connect to each MX server even if the first server say 
> "5.1.1 user unknown", but even worst, james try to connect to each IP of each 
> MX server.
> I think that james should only check each MX server once, at a random IP 
> address from the IP list for that mx hostname.
> The permanent user error issue would be only a further optimization but the 
> IP issue is probably against the RFC specifications.

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