Postfix converts uppercase user part of email address to lowercase.

Solution Verified - Updated -


  • Local users with all in small letters as "root" or "test" receive the mail without problems but postfix changes an upper case user name e.g. "Test" to lower case “test” so email goes to "test" instead of "Test"


  • Red Hat Enterprise Linux 5.3
  • postfix-2.3.3-2.3.el5_6
  • cyrus-imapd-2.3.7-12.el5_7.2

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