Most troublesome domains:
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Domain: ctv.es
Count: 3
Typical error: 550 Spam detected
Affected lists: secretsoflife
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Domain: carthageisd.org
Count: 3
Typical error: 550 sorry, permanent failure imposed by local policy (#5.7.1)
Affected lists: charlynecares
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Domain: wizardinc.com
Count: 3
Typical error: 550-Verification failed for >\n550-unrouteable mail domain "zip.mail-list.com"\n550 Sender verify failed
Affected lists: drmardy
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Domain: us.henkel.com
Count: 3
Typical error: 501 Sender domain must exist
Affected lists: drmardy
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Domain: echoes.net
Count: 3
Typical error: 552 Error: content rejected
Affected lists: charlynecares
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Domain: blackwell.net.au
Count: 1
Typical error: 554 >: Relay access denied
Affected lists: an-big-weekly-update
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Domain: cckia.com
Count: 1
Typical error: 550 5.7.1 Relaying not allowed: xxxx@cckia.com
Affected lists: 861
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Domain: stifel.com
Count: 1
Typical error: 550 5.7.1 Message rejected.
Affected lists: drmardy