Jerry, Actually I just relised what you meant. :P And that would work great by having it like that.. Something like this would work fine. If the email bounces return it to username_at_domain_etn@xxxxxxxxxxxxxxxxxxxxxx So I would set the sender as whatever I want and the return_path as a way to identify the user? Is that what you meant? That would mean I'd need a way to fetch the to: address from the pop3.php, how is this possible? At the pressent time I am doing everything manually. So I am going into the email and grabbing the address, doing a search on the database and when found flagging the account with abad email address. Quite time consuming when alot of bounces occours. So an automatic way to fasten up the process would be great. I don't mind if I have to activate the script manually. Just be great to have things moving along a bit faster than the pressent speed. Jerry Hello, That's tricky. What I do is to have a catch-all mailbox for my site domain. So, every message sent to a mailbox that does not really exist will be dropped in that catch-all mailbox. When I send messages to each user, I make the return path address be set to something like errors-user=domain@xxxxxxxxxx . For instance, messages sent to jusa_98@xxxxxxxxx by the PHP Classes site, will have the return path set to errors-jusa_98=yahoo.com@xxxxxxxxxxxxxx . Since these address really do not exist, they will be dropped in the catch-all mailbox for that domain. So, all I need to do is to run a script that polls the POP3 mailbox of my catch-all account and parse the To: address of the bounced messages to figure the subscriber address that is bouncing. Not all bounce message will have the To: address set correctly. The remaining message should be ignored. http://personals.yahoo.com.au - Yahoo! Personals New people, new possibilities. FREE for a limited time. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php