I have setup configuration to forward requests to a backend server... acl dspam urlpath_regex ^/mesg https_port 443 cert=/etc/certs/mail.pem key=/etc/certs/mail.key vhost vport cache_peer host.mydomain.com parent 80 0 no-query originserver name=mail login=PASS cache_peer_access mail allow mail cache_peer_access mail deny all never_direct allow !localnet http_access allow !localnet The problem is host mail resolves to mesg.mydomain.com instead of mail.mydomain.com. How can I force the header to be mesg.mydomain.com? Thanks in advance