Most troublesome domains:
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Domain: itri.org.tw
Count: 24
Typical error: 500 5.0.0 Service unavailable
Affected lists: naturecontents naturehcontents
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Domain: jerseymail.co.uk
Count: 12
Typical error: 550 5.7.1 mail m4MLklnY009226 from 67.200.150.179 rejected by DCC
Affected lists: the-daily-signal
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Domain: beltcollins.com
Count: 6
Typical error: 501 Syntax error in parameters or arguments
Affected lists: wwrecipesplus wwrecipes
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Domain: micso.net
Count: 6
Typical error: 550 Error: Message content rejected
Affected lists: naturmedica
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Domain: mixmail.com
Count: 6
Typical error: 550 Spam is not allowed here
Affected lists: an-big-weekly-update
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Domain: microsoft.com
Count: 6
Typical error: 550 5.7.1
Affected lists: learnfinance
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Domain: sefarad.org
Count: 6
Typical error: 554 5.7.1 Penalty Box error, please contact the server support to ensure delivery
Affected lists: naomiragen
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Domain: email.pittcc.edu
Count: 4
Typical error: 554 5.7.1 Spam filter: Please Visit http://www.ncmail.net/rejectedemails.htm to resolve issues
Affected lists: charlynecares
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Domain: zaderfamily.com
Count: 4
Typical error: 554 5.7.1 Message cannot be accepted, content filter rejection Reject Spam Content
Affected lists: love
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Domain: simplicitybynicole.com
Count: 4
Typical error: 554 5.7.1 Message cannot be accepted, content filter rejection Reject Spam Content
Affected lists: love