I need to send messages and redirect replies without storing them
If I have the mailbox option selected, outgoing message get sent OK but incomming messages get stored
if I have no mailbox, outgoing messages fail with the message
554: Transaction failed. The server response was: The IP address of the sender (IP.xx.xxx.xx) was found in a DNS blacklist database and was therefore refused.
(The IP address shown belongs to the internet service povider of the sender)
I've researched this and it's caused by the sender's ISP blocking the send using a PBL (see https://www.spamhaus.org/pbl/ )
How can I get round this. If i can't. is there a way to empty Mailenable inboxes automatically or programatically?