Email going for Vendor old address instead of corrected address

Hi Gurus,

I came to see strange scenario where emails were going to old email address instead of corrected email id.

1. Vendor Master is showing correct mail address and as well as ADR6 table shows correct email id but PO's not going to this.

2.Even in SOST it is showing the same old incorrect email id.

3.The Vendor Master was updated with correct New Mail id but in PO header level if we see Address it is having the old incorrect address.

4.I tired to creating a vendor in Test system and created a PO for the same later i have updated the vendor master but here it is working fine without issue.

5.Also to mention no Zprograms or tables present to hold data.

6.The email in ADR6 and in vendor master change it shows that email ID is changed to New one.I.e Physically we see the updated email ID but actually the PO emails going to wrong old email address.

I have tried to search in SCN for this case not able to find related to this case, Kindly can anyone shed light here.

Thanks,

Harsha