Hi Rudy On 18 August 2011 14:49, Rudi Ahlers <Rudi at softdux.com> wrote: > Hi all, > > I hope someone can help me with this please. > > > One of our clients has an in-house Postfix mailserver which basically > downloads mail for the individual users from our mail server hosted on > the web using fetchmail. > They use our SMTP server to send mail. Their email clients are then > setup to get & send mail from the server, on 192.168.2.254 (for POP3 & > SMTP). All mail between them on the local LAN gets send to each other > via the server, and not the internet. > > This works quite well, but as soon as someone sends mail from the > Linux server directly (it has webmin + usermin installed and has a > basic webmail interface for when they're out of the office) it sends > mail using the local machine name, instead of the domain name. > for example, mail comes from esther at ser001.rewards.local. > > How do I tell Postfix to automaticlly send mail from > <user>@<theirdomain.com> instead? > This comes straight out of the main.cf file and may be of some assistance: # INTERNET HOST AND DOMAIN NAMES # # The myhostname parameter specifies the internet hostname of this # mail system. The default is to use the fully-qualified domain name # from gethostname(). $myhostname is used as a default value for many # other configuration parameters. # #myhostname = host.domain.tld #myhostname = virtual.domain.tld # The mydomain parameter specifies the local internet domain name. # The default is to use $myhostname minus the first component. # $mydomain is used as a default value for many other configuration # parameters. # #mydomain = domain.tld # SENDING MAIL # # The myorigin parameter specifies the domain that locally-posted # mail appears to come from. The default is to append $myhostname, # which is fine for small sites. If you run a domain with multiple # machines, you should (1) change this to $mydomain and (2) set up # a domain-wide alias database that aliases each user to # user at that.users.mailhost. # # For the sake of consistency between sender and recipient addresses, # myorigin also specifies the default domain name that is appended # to recipient addresses that have no @domain part. # #myorigin = $myhostname myorigin = $mydomain #myorigin = $myhostname > > Sorry for asking this, but I don't know Postfix very well and don't > know what to call to, to search on google. > > -- > Kind Regards > Rudi Ahlers > SoftDux Regards, Andy.