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Changes between Version 13 and Version 14 of bulk-mail-relay

-              v13
+              v14
 In other words, all email destined for AOL (for example), regardless of which server the email originates on, gets relayed to AOL via aol.smtp.mayfirst.org. Meanwhile, aol.smtp.mayfirst.org can point to one IP address or, ideally, two or three (so if one IP address gets blocked, we simply turn it off and rely on the remaining two).
+The benefits of this strategy are:
+ * build a better reputation for any given email provider by combining all sent messages from all MF/PL servers so they originate from one, or a few, IP address
+ * provide flexibility so we can easily redirect messages being blocked on one server to be redirect to a different relay server
+ * permanently or temporarily rate-limit sending messages to certain providers, without affecting other providers
+ * take special action on messages just before being relayed (see, for example, our technique to avoid strict DMARC rules). By maintaining servers that only relay email out, we can safely apply rules that will not affect incoming messages.
 == Details ==