Horde forwarding error sendmail returned error code 255

[Snowman30]

got a strange problem popped up in horde.

whenever someone tries to forward a message from horde the get the error:

There was an error sending your message: sendmail returned error code 255

anyone know how to resolve this?

[minotauro]

Hello Snowman30,

See:

http://forums.cpanel.net/showthread....error+code+255

Regards,
Minotauro.

[Snowman30]

thanks but im not running the 2.6 kernel, im running 2.4.25, so it doesnt help