On Sun, Apr 16, 2023 at 09:15:24AM +0800, tom--- via Postfix-users wrote:
> one of web.de's sender IPs is listed into zen.spamhaus.org as the
> following info.
>
> 554 5.7.1 Service unavailable; Client host [82.165.159.35] blocked using
> zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBL175032
Intentionally at the request of web.de it seems. Did you read:
https://www.spamhaus.org/sbl/query/SBL175032
If your message was blocked, and was not spam, contact:
https://postmaster.web.de/en/case?c=uar
--
Viktor.
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