On 14.12.2025 13.43, Thomas Bohl wrote:
Am 14.12.25 um 11:29 schrieb Stéphane Guedon:
For reminders : I cannot connect to my main mail server from the backup. The main mail server (blackblock) is listening on on ipv6 on a dedicated port and I can see that a connection is possible (no blockage from firewalls).

And yet, I got this :

debug: mta-routing: skipping host 89.150.157.50: AF mismatch
debug: mta-routing: skipping route [2603:c026:306:9211::300] <-> [2a05:f6c7:de1::2] (blackblock): not validated yet
debug: mta: hit route limit
debug: mta-routing: no route available for [connector: [2603:c026:306:9211::300]-  >[relay:blackblock.22decembre.eu,port=10027,smtps,pki_name=dina,mx,sourcetable=<dynamic:2>],0x0]: limits reached

Now we have a different error message than at the beginning of this thread. At the beginning 2603:c026:306:9211:f:10d:c:9f55 could connect to 2a05:f6c7:de1::2, but there was a protocol mismatch. Now the connection comes from 2603:c026:306:9211::300 and can't even reach 2a05:f6c7:de1::2.

What is your action line on the backup server? Better yet. Post your full configurations.

I suppose it's best indeed. Here is blackblock's conf (the main server) https://pastebin.com/nAKFADH9

Here is Dina's conf (backup)
https://pastebin.com/4ea7QgzU

All feedback welcome.





action "relay" relay host smtp+tls://blackblock.22decembre.eu:10027 pki dina tls
protocols secure src 2603:c026:306:9211:f:10d:c:9f55

Yes

That is not the IP shown in the logs though. So it can't be.



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