hi, i have @server1.domain.com, #server2.domain.com, @server3.domain.com and @server4.domain.com and i distrib the e-mail users in that four servers for equal. 2 servers have: dovecot+sendmail+mailscanner+spamassassin+clamav+ssl/tls+squirrelmail and other two have: dovecot+postfix+amavisd+spamassassin+clamav+squirrelmail+ssl/tls, all this machine over https and firewall with drop rule for defect. ok, there more, i have one machine to receive e-mails and other machine to send e-mails. this is que question: i want have only one machine with https and squirrelmail (i have the machine) than the users can view the e-mails only with transparent one domain, per example, @domain.com. i do the method to send and receive e-mails by separate machine through the squirrelmail config but i don't know how i can do the transparent @domain.com ??? what is the name of this method or what is the idea than i can permit to resolve this problem... thank for all..ROberto.-