On Fri, Feb 21, 2020 at 12:36 PM Tom Browder <tom.brow...@gmail.com> wrote: > On Fri, Feb 21, 2020 at 12:05 PM Brian <a...@cityscape.co.uk> wrote: > > Thanks, I will read the page in detail later. Meanwhile, I did a quick > > search on the page for "mailname" and didn't get anything. Anyway, what > > I really wanted to know was what function *you* thought /etc/mailname > > played in OpenSMTPD because it would determine what you chose for it. > > > > On Exim it is used to qualify a local part without a domain name. After > > I installed OpenSMTPD it seems to me that this is also what OpenSMTPD > > does. In other words, if I had mailname as gmail.com, a mail I send to > > tombrowder (no domain name) would go to tombrow...@gmail.com. > > Brian, you may be right. I cannot find anything in the man pages, but > it may have been stated during the installation of the Debian package. > I'll uninstall and reinstall to see if I can capture the > instructions...
Okay, here are the instructions, just as you said: The "mail name" is used as the domain name in the email address for messages that only have a "local part" (such as │ <jrandomuser> or <root>). It should be a fully qualified domain name (FQDN) that you are entitled to use. │ │ For instance, to allow the local host to generate mail with addresses such as <jrandomu...@example.org>, set the │ system mail name to "example.org". So, I guess I can trust opensmtpd to do the right thing if I set up its configuration properly. And for the DNS just make every domain have its own mail server (as long as everything eventually maps the the correct server IP listening on port 25). Thanks. -Tom
