i'm the administrator of one zimbra server and i have an special issue, we use the zimbra server to send mails with a system to many destinations and what i need is
block all "outgoing mails" from zimbra to firstname.lastname@example.org
BUT is very important not reject mails from email@example.com
siidte is just a SENDING account from sii.cl and not allow receibe mails the problem is that many times siidte send mails to one or more accounts of my zimbra server that not exist
then zimbra respond with delivery status notification to siidte and then sii.cl block my IP with the error too many invalid recipients
so this is why i need to allow the reception from firstname.lastname@example.org and block the sending mails from my zimbra to siidte
how can i do this?