Release 7.0.1_GA_3105.DEBIAN5_64 DEBIAN5_64 FOSS edition.

I've created global disclaimer following post instructions and parameters
  • zimbraDomainMandatoryMailSignatureEnable = TRUE
  • zimbraDomainMandatoryMailSignatureHTML is set
  • zimbraDomainMandatoryMailSignatureText is set

When I sent a message from web interface nothing happens, but if I do from Thunderbird client the disclaimer is attached to the message.

Any idea? Thanks.