[imp] Unable to send mail (ERROR : "Address is missing domain")

[Anand Palani]

Hello,

I have installed and configured Horde groupware 5.1.3 edition, also I 
have integrated my ldap with horde.

1).  I am able to login to horde and IMP using my ldap user name 
(Ex:anand at example.com <mailto:anand at example.com>) and also able send 
mail to other domains.

2).  what my problem is , when i am login into horde & IMP using my ldap 
username (Ex : anand) i am able to login,  when i am send mail but  I 
couldn't send mail (ERROR : "Address is missing domain").

I have used authentication is  " lets horde application handle 
authentication ", when i use ldap authentication i am getting error , no 
luck with that

Kindly look the issue

Thanks,
Anand Palani