Cannot send e-mail From Send as Distribution group

Hi all,

I am sorry for my English, but I need help. We have Exchange 2013 and MS Outlook 2007 / 2010 / 2013.

Problem is:

I created Distribution group SFO@domain.cz

I set group delegation Send As: domain user

When I send e-mail by using OWA From SFO@... It is OK

When I send e-mail by using outlook From SFO@... I get: This message could not be sent. Try sending .... Error code is [0x80070005-00000000-00000000].

Can anybody help my??

Thanks for your help.