Most troublesome domains:
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Domain: aon.at
Count: 18
Typical error: 554 mail server rejected message: spam detected (#5.3.0)
Affected lists: the-daily-signal petwarmers
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Domain: englebusiness.com
Count: 13
Typical error: 550 5.7.1 >... Relaying denied
Affected lists: techtogo
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Domain: atlantic.com.gh
Count: 3
Typical error: 530 Recipient refused. Your IP has triggered the SPAM Trap.
Affected lists: heartwarmers
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Domain: cccofva.org
Count: 3
Typical error: 550 Blocked
Affected lists: the-daily-signal
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Domain: netbizz.us
Count: 3
Typical error: 554 5.7.1 PB error, please contact the server support to ensure delivery
Affected lists: glidervet
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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: sdb.k12.wi.us
Count: 3
Typical error: 550 Tagged as spam, score 6.5.
Affected lists: petwarmers
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Domain: jet.es
Count: 3
Typical error: 550 Spam detected
Affected lists: wwrecipes
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Domain: ford-gelatt.com
Count: 3
Typical error: 554 5.3.0 1216728158.28691.k079 Destination server rejected recipients
Affected lists: levitt-newsletter
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Domain: ntelos.net
Count: 3
Typical error: 550 5.7.2 This smells like Spam.
Affected lists: glidervet