Email IP Reputation Segmentation for Spam Isolation
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Solution Overview
Problem
In e-mail delivery systems, senders with bad reputations due to spamming can negatively impact other customers by causing their legitimate emails to be blocked or marked as spam, even though they share IP addresses with spamming customers, leading to a bad reputation for all users.
Innovation Solution
The system manages IP addresses based on sender reputation by dividing the IP address pool into segments and assigning senders with good reputations to a broader range of IP addresses, while limiting those with bad reputations to fewer options, thus isolating their impact and preventing them from affecting other users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple customers share the same IP address for e-mail delivery, then resource utilization is improved, but the reputation of the IP address deteriorates when one customer sends spam
Solution Approach 1:
The patent segments the customer base into different reputation groups based on their e-mail sending behavior and spam complaints. Each group is assigned to dedicated IP address pools, preventing contamination between customers with different reputations. This segmentation allows resource sharing within groups while isolating the impact of any single customer's spam activity.
Solution Approach 2:
The patent implements local quality by assigning different IP address qualities (reputation levels) to different customers based on their individual sending patterns. High-reputation customers receive access to high-quality IP addresses with better deliverability, while low-reputation customers are restricted to lower-quality IP pools. This ensures that each customer's e-mails are sent from appropriately matched IP addresses.
2Object-affected harmful factors
If the remote mail system blocks e-mail from an IP address due to spam detection, then spam filtering is improved, but legitimate e-mail delivery from shared IP addresses deteriorates
Solution Approach 1:
The patent segments the e-mail delivery infrastructure into multiple isolated IP address pools, each dedicated to specific reputation groups. When spam is detected from one pool, the blockage is contained to that specific pool and does not affect other pools. This segmentation prevents the 'one bad apple spoils the bunch' problem while maintaining effective spam filtering.
Solution Approach 2:
The patent introduces reputation groups as an intermediary layer between individual customers and IP address pools. This intermediary allows the system to manage IP reputation at the group level rather than the individual customer level, enabling more granular control over e-mail delivery while maintaining effective spam blocking.
3Productivity
If a single IP address is used for high-volume e-mail sending, then sending capacity is improved, but the ability to isolate bad reputations deteriorates
Solution Approach 1:
The patent divides the e-mail sending infrastructure into multiple parallel IP address pools, each capable of handling high-volume sending independently. This segmentation allows the system to maintain high overall sending capacity while isolating reputation risks within each pool. No single pool becomes a bottleneck, and reputation contamination remains localized.
Solution Approach 2:
The patent merges multiple high-capacity IP pools into a unified e-mail delivery system that operates as a single logical entity. While the system presents a unified interface to customers, the underlying infrastructure remains segmented into independent pools that can be managed and isolated separately, combining the benefits of high capacity with reputation isolation.
Data Source
AI summary
Technologies are described herein for managing the IP addresses of outbound e-mail messages based on sender reputation. A range of reputation scores is divided into a number of reputation segments, each covering a span of the reputation scores. The available IP addresses are distributed evenly among the reputation segments. The span of reputation scores for each of the reputation segments may be periodically adjusted based on historical data regarding a volume of e-mail messages sent by sender reputation score. In order to select a source IP address for a particular outbound e-mail message, the reputation segment encompassing a sender reputation score regarding the sender of the e-mail message is determined. An IP address is selected from the IP addresses assigned to the reputation segment and returned to be utilized as the source IP address in sending the outbound e-mail message.