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ERROR (2): Header may not contain more than a single header, new line detected. (/webmail/inc/inc.php:169)

If you see this error in /webmail:

ERROR (2): Header may not contain more than a single header, new line detected. (/webmail/inc/inc.php:169)

edit /var/www/html/webmail/inc/inc.php, go to line 169.
Change

Header("Expires: Wed, 11 Nov 1998 11:11:11 GMTrn".
"Cache-Control: no-cachern".
"Cache-Control: must-revalidate");

to

Header("Expires: Wed, 11 Nov 1998 11:11:11 GMT");
Header("Cache-Control: no-cache");
Header("Cache-Control: must-revalidate");

Save, and exit.


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