Most troublesome domains:
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Domain: pldi.net
Count: 24
Typical error: 550 5.7.1 header subject_10
Affected lists: romantic
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Domain: wma1880.org
Count: 20
Typical error: 550 Message held as spam. Message will be reviewed by email recipient.
Affected lists: oncourse
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Domain: intelnett.com
Count: 12
Typical error: 554 5.7.1 >: Sender address rejected: Access denied
Affected lists: boletin
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Domain: redcrs.com.ar
Count: 9
Typical error: 555 Message rejected: site policy does not allow pure HTML data - please resend as text.
Affected lists: boletin
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Domain: xmu.edu.cn
Count: 9
Typical error: 550 black ip. (\267\242\320\305IP\261\273\275\373\326\271)
Affected lists: naturecontents
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Domain: intelnet.net.gt
Count: 9
Typical error: 554 5.7.1 >: Sender address rejected: Access denied
Affected lists: boletin
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Domain: qconline.com
Count: 7
Typical error: 521 This system is configured to reject mail from 67.200.150.180
Affected lists: romantic oncourse
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Domain: scarlet.be
Count: 6
Typical error: 550 5.7.1 bulkmail m47ML5jb020310 from 12.53.208.133 rejected
Affected lists: the-daily-signal
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Domain: erau.edu
Count: 4
Typical error: 550 5.7.1 >... Command rejected
Affected lists: oncourse
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Domain: howardcc.edu
Count: 4
Typical error: 550 Denied by policy.
Affected lists: oncourse