Most troublesome domains:
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Domain: clc-ctc.ca
Count: 4
Typical error: 554 5.7.1 This message has been blocked because the return email domain is invalid.(failed to obtain DNS record for domain irqo.net)
Affected lists: irqo
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Domain: ukr.net
Count: 3
Typical error: 550 spam message
Affected lists: love
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Domain: cici.mb.ca
Count: 3
Typical error: 554 5.7.1 Error, send your mail to xxxx@cici.mb.ca to ensure delivery
Affected lists: wwrecipesplus
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Domain: redbird.net
Count: 3
Typical error: 554 Failure Message looks like spam, sorry not wanted here q=71378045
Affected lists: wwrecipes
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Domain: usiu.ac.ke
Count: 3
Typical error: 550 5.7.1 Message rejected as spam by Content Filtering.
Affected lists: love
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Domain: atginternet.com
Count: 3
Typical error: 554 5.7.1 This message has been blocked because it contains a banned word.
Affected lists: love
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Domain: aii.edu
Count: 3
Typical error: 550 5.1.1 >... EDMC Policy Violation
Affected lists: wwrecipes
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Domain: village.uunet.be
Count: 3
Typical error: 550 5.7.1 bulkmail m6OM6sbR005353 from 12.53.208.133 rejected
Affected lists: the-daily-signal
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Domain: europarl.europa.eu
Count: 2
Typical error: 501 5.7.1 This system is not configured to relay mail (r) from > to > for 64.241.105.6
Affected lists: irqo
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Domain: ranksitt.com
Count: 1
Typical error: 550 5.7.1 >... Relaying denied
Affected lists: donjuantip