When I install Postfix as a mail server to transfer emails from my Content Management System's contact-forms, into my Gmail account, I choose the option internet-site. After I choose that option Postfix asks me to insert the domain of my site.
但是，我有2个或更多站点而不是一个站点？那我应该插入哪个域？
我不认为Postfix的创建者希望用户输入一长串用逗号分隔的域。
谢谢，
选项列表不是标准的Postfix功能。这可能是Linux发行版的软件包管理系统的结果。也许是Ubuntu，或其他与Debian相关的发行版？
If I'm correct, you should treat the option dialog as an "easy first installation wizard" only. For a non-trivial configuration, the "training wheels" will have to come off: you'd use the
postconfcommand to further adjust the configuration, or perhaps stop Postfix and then replace the default configuration files with your own customized ones.