The local part of an email address (i.e., the "PugSA" in "PugSA@example.com") is case sensitive. This is specified in RFC 2821. It's a good idea not to treat your local addresses case sensitively, but it's a bad idea to assume a remote system is not case sensitive until you know otherwise.

In reply to Re^2: contact details by kyle
in thread contact details by PugSA

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