hi! i've set up a suse linux 8.0 web server for our local intranet. the server is behind a router with nat firewall. when i send mails with php.mail the local mail server delivers them to any destination. this day the mailserver of one of our customers broke down for several hours. my question is: what happens now ? will the local mailserver retry delivering until it works or will it send a failure notice to the reply address specified in the mail body ? it seems that all mails arrived the customer. but to make sure that everything is working fine i tried to send a mail to a non existent mail address, i got no failure notice until now.
- if the other mail server sends the failure notice to the specified mail reply address
- or if it tries to connect to my local server (which is protected by the firewall)