The department currently maintains two Webmail clients that can be used for accessing your physics mail from any web browser:
Both of these mail readers are configured so that they automatically see your main INBOX (which might normally be empty if you use POP). They are also capable of seeing your other mail folders, such as your SPAM folder, but extra steps may be needed to configure this. (I assume below that your mail directory is "mail" and the spam folder name is "SPAM"; if not, make the appropriate substitutions.)
Squirrel Mail
According to its default settings, Squirrel Mail expects your mail folders to be kept in a subdirectory called "IMAP-mail" in your home directory. To change this to "mail", click the "Options" menu near the top, choose "Folder Preferences", and change "Folder Path" from "IMAP-mail/" to "mail/".
Squirrel Mail allows you to "subscribe" or "unsubscribe" to various mail folders. To make sure you are "subscribed" to your SPAM folder, click the "Folders" menu near the top, look at the "Unsubscribe/Subscribe" lists, and subscribe to your SPAM folder if it appears on the list at right.
Then, choose the "SPAM" folder from the menubar at left and read, move, or delete mail as appropriate.
Valencia Mail
Valencia Mail, too, expects your mail folders to be kept in a subdirectory called "IMAP-mail" in your home directory, and unfortunately does not provide a way to change this. As a work-around, login to the Sun system, go to your home directory, and issue the command
ln -s mail IMAP-mailThis creates a soft link pointing from "IMAP-mail" to "mail".
No "subscription" step is required for Valencia Mail.
Then, click the "Mailboxes" menu near the top, choose "SPAM", click "Open mailbox", and read, move, or delete mail as appropriate.