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It is allowed to matter per the rfc. However I believe 99% of all mail servers in the world are configured to make it non case sensitive.
by Too 9y ago
It is allowed to matter per the rfc. However I believe 99% of all mail servers in the world are configured to make it non case sensitive.
- sandov 9y ago>It is allowed to matter And we don't know when it will matter and when it won't matter, therefore we have to assume that it does matter unless we are sure it doesn't for our specific case.