I could not log in to my webmail. I kept getting the error

ERROR (2): Header may not contain more than a single header, new line detected. (/path/to/webmail/inc/inc.php:156)

I am running Uebimiau version 2.7.10 and there is a bug in the file inc/inc.php. You need to change

PHP:
  1. Header("Expires: Wed, 11 Nov 1998 11:11:11 GMT\r\n".
  2. "Cache-Control: no-cache\r\n".
  3. "Cache-Control: must-revalidate");

to this

PHP:
  1. Header("Cache-Control: no-cache");
  2. Header("Cache-Control: must-revalidate");

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