On 2/7/25 12:41 PM, Frank Heydlauf via Exim-users wrote:
Hi,

On Fri, Feb 07, 2025 at 12:26:32PM +0100, Olaf Hopp (SCC) via Exim-users wrote:
Dear List,
for routing to my two outgoing smarthosts I have on the internal systems a 
transport like

     hosts= smarthost-A : smarthost-B
     hosts_randomize = true
     hosts_override = true

which result in a nice 50:50 distribution of outgoing mails.
I have to move smarthost-B into a different network with different IPs
Is there a way to "warm up" the IP-reputation of smarthost-B by starting
with e.g. a 90:10 distribution and increase that over the time ?

Just a guess (untested) - have you tried sth like
  hosts = A : A : A : A :A : A : A : A : A : B


This was also my first wild guess, but I thought Exim is too
intelligent for this simple aproach.
But indeed it works !
So, no sophisticated math is necessary, just a line like
        hosts = A : A : A : A : A : A : A : A : A : B
and then reducing the number of A's over the time.

Regards, Olaf


--
Karlsruher Institut für Technologie (KIT)
Scientific Computing Center (SCC)

Dipl.-Geophys. Olaf Hopp

Zirkel 2
Gebäude 20.20, Raum 158
76131 Karlsruhe

Telefon: +49 721 608-48009
E-Mail: olaf.h...@kit.edu
Web: www.scc.kit.edu

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