destination limits - what is 'destination'

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destination limits - what is 'destination'
\ Stefan Palme (14 Nov 2007)
. \ (Wietse Venema) (14 Nov 2007)
. . \ Stefan Palme (14 Nov 2007)
. \ Stefan Palme (14 Nov 2007)

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Subject:	destination limits - what is 'destination'
Group:	Postfix-users
From:	Stefan Palme
Date:	14 Nov 2007

Hi again,

$default_destination_concurrency_limit limits the number of parallel
deliveries to the same "destination". But when have to mails the same
"destination"?

mail1 recipient: user1
mail2 recipient: user2

> host -t mx domainA.com
... mailer.domainA.com

> host -t mx domainB.com
... mailer.domainB.com

> host -t a mailer.domainA.com
... 1.2.3.4

> host -t a mailer.domainB.com
... 1.2.3.4

In fact, both mails would go to the same mailhost regarding
its IP address. But neither the MX record of the two recipient
domains nor the A record of those MX records are the same.

Is @domainA.com and @domainB.com the "same destination" or not?

If not, how to decide if two recipient addresses have
"the same destination"?

Regards
-stefan-

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