send mail

Dear Guru,

I want to send mail for vendor payment advise. I have tested the process in development & Quality server and it working smoothly. But while i am trying it in production server it give me a error, that is Express document Cannot be sent: Payment Advice received from author "". My question is that when i test it through basis user then it should be show author is basis. But it sometime shows another userid.

thanks

Samrat Chakraborty