F110(PAYEMENT ADVICE)

Hi,

We have a issue regarding the payment advice. When the user is running the payment advice the mail which is sent through SOST has gone correctly to all employee vendor except one vendor. His mail has gone to another one vendor. We have used ABAP program and we checked the logic,the email id is picked from vendor master table(lfb1) and the mail id is maintained correctly for that vendor. We tried all our possibilities but we are are not able to find out. Please help us out.