SpamCop.net is a third-party spam reporting service that allows recipients of unwanted emails to report the sender to their Internet Service Provider. Some organizations use SpamCop's reporting to filter their incoming email as it is often indicative of unsolicited contact or poor list maintenance practices.
Being temporarily listed on a blacklist does not necessarily have a large effect on email delivery rates. Getting de-listed from Spamcop.net blacklists generally take 1 business day. This listing is not VerticalResponse's decision and Spamcop can choose whether or not they want to respond and when.
VerticalResponse sends emails across a range of IP addresses to maintain an expedient and high delivery rate. You may see a small percentage of email addresses fail due to the listing, but the majority of your mail will still go through.
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