Dnia 20.10.2022 o godz. 17:10:40 Kai 'wusel' Siering via mailop pisze:
> 
> But, as you ARE an Exim developer, how about starting internal discussions
> within that community to include a default rejection of any mail from
> @t-online.de in Exim's default configuration?
> 
> As nearly no-one who is deploying Exim (or Postfix, Sendmail for that
> matter) will be able to *send* to @t-online.de due to their policy, it is
> only logical to not *accept* any mail from them, too.  Those who did
> whitelist their server could remove that config, but for the majority of
> the users, this small config change will solve the issue.  Same should
> happen with Postfix, and the Package Maintainers at Debian, Ubuntu,
> RedHat, etc.  should look into changing their default configuration in a
> similar way as well.
> 
> This is the only reasonable approach, as, as we learned yesterday,
> t-online.de's MXes are configured in a way that do not let any mailserver
> connect — unless it's postmaster arranged a whitelisting with them
> upfront.
> 
> The setup of t-online.de's mailservers is, AFAIK, unique, and therfore it
> should be preconfigured appropriately in mailserver packages, so no more
> postmasters drop into that pitfall.

+1

Could you please repost this to appropriate Exim and Postfix mailing lists?
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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