> But the original sender will not be user on my mail server. It doesn't have to be.
> it will be any client that sends mail through application. No. A client is a client. The sender is specified by the application. > I don't want client to receive bounces. How can I do that? Frankly, I don't think you should be doing this. Possible solutions: =================== 1) Specify the null sender as sender, thus mails cannot bounce. 2) Specify a sender domain pointing to another server (e.g. bounces.example.com) -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de