Re: [exim] Retry interval with multiple mx

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Author: Jasen Betts
Date:  
To: exim-users
Subject: Re: [exim] Retry interval with multiple mx
On 2017-07-03, Andreas Sachs <andilist@???> wrote:
>    Hello,
>    i have a question to retry intervals of deferred messages.

>
>    As far as i could see, if exims tries to send a message and receives a
>    temporal error (deferred), all further messages to the same recipient
>    are freezed until the retry interval is expired. This was observed with
>    only one MX entry.

>
>    I assume that a second delivery attemp will be started immediately if a
>    second mx is present.

>
>    What will happen if the second mx points to the same ip as the first?
>    Does exim uses the name or the ip to maintain retry intervals?
>    MX  mx1.domain.de
>    MX  mx2.domain.de
>    mx1.domain.de  -> 1.2.3.4
>    mx2.domain.de  -> 1.2.3.4


If 1.2.3.4 says "450" exim will give up until after the apropriate retry
timer expires, there will not be an immediate retry on the "other" 1.2.3.4

>    Reason for this question:
>    I have trouble sending mail to an MX pool. There is only one MX entry
>    with one IP-adress. But behind the IP-adress, there is a pool of
>    multiple mail servers. But if the sending mail server receives a
>    deferred message, it is not trying another server.


the load-balancer for that pool is broken.

>    (i cannot change this setup)


I'm guessing whoever set that up wants it to be broken like that.

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