Sender Reputation in a Large Webmail Service
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In this paper, we describe how a large webmail service uses reputation to classify authenticated sending domains as either spammy or not spammy. Both SPF and DomainKey authentication are used to identify who the sender of the mail is. We describe a simple formula for how we calculate the reputation and how it is used to classify incoming mail. We show in general how domains, both good and bad, get distributed among the various reputation values, and also show the reputation values for a few specific domains. We describe some of the problems associated with this reputation system, and propose some recommendations for senders to avoid those problems.
[1] Grant Neufeld,et al. The Use of URLs as Meta-Syntax for Core Mail List Commands and their Transport through Message Header Fields , 1998, RFC.
[2] Meng Weng Wong,et al. Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1 , 2006, RFC.
[3] Mark Delany,et al. Domain-Based Email Authentication Using Public Keys Advertised in the DNS (DomainKeys) , 2007, RFC.