HI i created a mailbox email address so i have one mailbox address and one alias address. can i log into webmail using the mailbox address or does it have to be my usuall plusnet username. adie:green removed all caps title as per link:rules
If your mailbox is the default mailbox you login on webmail using just your account username and account password. If the mailbox is an additional mailbox you login on webmail with username account_username+mailboxname (including the + sign) and password that for the mailbox. These are no different from the details for picking up mail using POP3 or IMAP access with an email client like Thunderbird.