On HostStack cPanel hosting, email accounts are created per domain that is attached to the account. Use Email Accounts to add addresses, define quotas, and send welcome links for mailbox passwords.
Pick mailboxes that match how you operate — separate billing@ and support@ inboxes often reduce accidental replies from shared aliases.
Webmail
HostStack supports standard Horde/Roundcube-style webmail entry points exposed by cPanel. Bookmark your server webmail URL once provisioned so teammates stop guessing paths.