On Thu, 16 May 2013 09:02:57 +0100 Klaus Doering <klaus.doering...@gmail.com> wrote:
> > The RaspPi (running Raspbian, a version of Wheezy for the ARMHF > architecture) also acts as a mail server, talking > SMTP to the wider world using exim4. After I got an error message > from some strict server telling me > > 504 5.5.2<rpi>: Helo command rejected: need fully-qualified hostname > > > I noticed that exim does NOT use the DHCP-provided domain name. > The unqualified host name is set in /etc/hostname, and in /etc/hosts > I intentionally did not set the external IP or > domain name. > Apart from any other issue, please note that the HELO string provided by your mailserver really needs to be a hostname which can be resolved in *public* DNS. On the assumption that you're not running your own public DNS server, then you will need an A record with your domain host. It's easiest if you use the same A record your MX points to, though it's not necessary. Not all mail servers will require their senders to have a resolvable HELO, but many will, including my exim4. It's disabled by default, I think, but it's a useful spam reduction technique. Oddly, some of the pickiest servers now seem to be Exchange installations. -- Joe -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130516190616.034fd...@jretrading.com
