Hi, sorry if I write again, but I've found how to queue directly in HOLD. Basically the option is: smtpd_sender_restrictions = static:HOLD
But in this way all the emails will be queued, even the internal one... There is a way to queue just the emails that will be relayed externally? Googling a bit I found that should be something like: smtpd_sender_restrictions = permit_auth_destination static:hold but it's not working for me... In my configuration I'm matching the internal addresses in transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf Thanks Michele
