SpamCop is a service that determines the origin of unwanted email and reports it to the relevant ISPs. SpamCop allows individuals to report spam. By reporting unsolicited email, recipients provide data to spam filtering systems, including SpamCop's own service.
SpamCop is considered a major blacklist provider and can have an affect on the results of emails. A SpamCop listing can be painful and can result in spam folder placement or blocking.
SpamCop does not publish what its complaint threshold is.
SpamCop does not want senders to be able to identify complainants, as SpamCop sees them as valuable tools to monitor sender activity.
The best strategy to avoid a SpamCop listing is to adhere to best practices of data acquisition and list hygiene.
Why is a sender listed by SpamCop?
SpamCop uses a public reporting system to determine whether a sender is placed on the blacklist. They have thousands of individual users who participate in their service and report spam to SpamCop when they receive it. If enough users indicate that a particular sender is broadcasting spam, SpamCop adds that sender to the list.
How does a sender get de-listed from SpamCop?
SpamCop listings are temporary. If complaints decrease or if no more emails are sent, the listing expires. However, if the sender continues to send and if complaints remain high, the listing persists. Any SpamCop listing should be treated as a red flag and the cause investigated.
For more information, see SpamCop Blocking List.