Hello I set up ispconfig on a new host and am trying to send and receive emails through an smtp gateway. I use MailCleaner as a gateway, I register the domain and sending is ok after informing the relay smtp. However when I send emails to this domain MailCleaner cannot validate the callout and always returns with the error mentioned: Remote server replied: 550-Callout verification failed: 550 550 Delivery is not allowed to this address. Forgot something disabled? How to get around this and make validation work? Thanks
Hi till I use it with ZImbra, Hmailserver and 4 more Linux based mailservers, and it works without problems. Would I need some additional adjustment to the configuration files before I can receive mail forwarded by the gateway?
