warning prepend_header

[Guillermo Guillen Angel]

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Hi list.

I installed  IMP 3.0 and had it up & running, but when I send a message
the following warning is displayed

Warning: Undefined index: prepend_header in
/usr/local/apache/htdocs/horde-2.0/imp-3.0/lib/IMP.php on line 866

does anyone know how to fix this?

thanks


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L.I. Guillermo Guillén Angel                 tels. 36194028  ext. 117
Jefe del                                           36196910
Centro de Computo de Investigación y Posgrado      36192379
CUCEI                                              36196017
Universidad de Guadalajara                         36503680
                                             fax.  36194028
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