Acceptable Spam Report Rate

For email marketers the best acceptable rate would be zero but realistically, at least for those just entering the online marketing arena, there will be some higher numbers reported regardless of how carefully email addresses are gathered. However, any percentage over 0.1% is unacceptable. For a sender to have more than 1 in 1000 emails reported as spam  a warning message will be generated and sent stating that the originating IP address may be blacklisted. The ramifications, if the IP is blacklisted, are that the majority of email newsletters will be rejected by major email providers, and at the very least, will greatly reduce the viability of future email marketing campaigns.