webmail access

[#1]

I normally use Outlook Express for email. How do I access my additional addresses (rather than my postmaster one) using webmail or 'mail2web' type sites as I only seem to be able to get postmaster mail which is not my main account.
Many thanks,
Stewart

[#2]

When you enter the username, you need to enter the mailbox name too.
username+mailboxname
The + is important, as it the order of your account username before the + and the mailbox name after it. The password you enter is the password for the additional mailbox you are attempting to collect the mail from.

[#3]

Sorry I must be thick... I just can't get into it at all.
Let's say that I have the normal 'postmaster@stewarta13wsb' and I have 'test@stewarta13wsb' as my second address, should I key in 'stewarta13wsb+test'  ?? or what?

[#4]

yes