New answers tagged domain
It can mean virtually anything. While there are some common conventions for server names at domains (www, mail, support, etc.) it's just that: a convention. Once you get beyond the common ones, though, anything goes. Most likely, the owners of the domain are using it to distinguish it as an app rather just a regular website. Or it's the place to download ...
This question has been answered here, but I'm unable to close it because of the bounty. In short, you may use Gmail's SMTP server for your alias address, as long as you have enabled two-factor authentication.
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