Re: [Exim] how to prevent mail loops if exim is relief MTA f…

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Autor: Marc Haber
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A: exim-users
Assumpte: Re: [Exim] how to prevent mail loops if exim is relief MTA for a broken sendmail
On Thu, 30 Mar 2000 15:22:10 +0100 (BST), you wrote:
>On Wed, 29 Mar 2000, Marc Haber wrote:
>> domain MX 10 mail.customer.example.com
>> domain MX 20 S
>>
>> I am now concerned about what would happen if
>> mail.customer.example.com goes down. Would this cause the exim on E to
>> fall back to the secondary MX S, thus causing a mail loop? Can I
>> configure E to refrain from falling back to S in case S is a secondary
>> MX?
>
>hosts_treat_as_local


So, I now have set
hosts_treat_as_local = "S".

While this seems to solve the immediate problem, it causes log file
entries with verification of sender addresses of domain example.com
with

example.com MX 10 S
example.com MX 20 E

|2000-04-13 09:16:48 remote host address is the local host: example.com (while verifying <sender@???> from host S [s1.s2.s3.s4])
|2000-04-13 09:16:48 warning: temporarily unable to resolve sender address: accepted unverified <sender@???> H=S [s1.s2.s3.s4] (root)
|2000-04-13 09:16:48 12fdrs-0003dI-00 remote host address is the local host: example.com
|2000-04-13 09:16:48 12fdrs-0003dI-00 <= sender@??? H=S [s1.s2.s3.s4] U=root P=esmtp S=759 id=38F572CC.FEBCC6A6@??? from <sender@???> for recipient@???
|2000-04-13 09:16:49 12fdrs-0003dI-00 => recipient@??? R=lookuphost T=remote_smtp H=mail.other.example.com [i1.i2.i3.i4] C="250 JAA01827 Message accepted for delivery"
|2000-04-13 09:16:49 12fdrs-0003dI-00 Completed

Do I have to turn off sender verification for example.com or is there
a way to make verification work in spite of hosts_treat_as_local?

Greetings
Marc

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