>From my queue:
==============

4NRDBY1xyHz1Z1SX    286400 Tue Dec  6 09:30:29 sen...@charite.de
(connect to kompetenznetz-darmerkrankungen.com[18.64.79.37]:25: Connection 
timed out)
                                               
recipi...@kompetenznetz-darmerkrankungen.com

and dig says:
=============

# host kompetenznetz-darmerkrankungen.com
Host kompetenznetz-darmerkrankungen.com not found: 3(NXDOMAIN)
# host -t mx kompetenznetz-darmerkrankungen.com
Host kompetenznetz-darmerkrankungen.com not found: 3(NXDOMAIN)

I restarted the local "unbound" process. Same result.

Relevant options ( postconf |egrep "(resolv|dns)" ):
====================================================

disable_dns_lookups = no
dns_ncache_ttl_fix_enable = no
smtp_dns_reply_filter =
smtp_dns_resolver_options =
smtp_dns_support_level = dnssec
smtp_host_lookup = dns, native

What am I doing wrong here?
Why is this mail not bouncing?

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