>> localpart case sensivity according to rfc5321: >> >> "The local-part of a mailbox MUST BE treated as case sensitive." > You are misunderstanding. Relaying MTAs MUST treat the local-part as > case sensitive. IOW, until the message is received at the destination, > case must be preserved. However, the RFC does NOT require any > organization to treat their local addresses as case sensitive. It > would be pointless anyway as you could just say all the variations of > case are aliases.
Really? I thought about that, but I think it's not that easy. What if you are a provider (relaying for one or more organisations) and the rate-limiting happens at your relay? I know about several providers using rate limits to throttle their customers on unusual mass-mailing events. Of course these rate limits will not modify the envelope address case but nevertheless have consequences depending on their implementation (means if you count "bob" and "BoB" differently or not). Again sorry to the list maintainers. If you think, that this is not the right place for this discussion, anybody is free to share his opinion at info at postfwd dot org.
