A number of users have reported a problem that began on 1/12. Rather than post and answer those individually I'm addressing it here.
When printing some emails directly from Web Mail, some users are getting only the headers on page 1, then a blank page or two, then sometimes the rest of the body prints and sometimes not. This does not happen with all users or all printers, but we have had enough reports to know it is a problem.
This problem is being fixed and the fix will be released soon. I apologize for the inconvenience. In the meantime, some users have suggested that they can print successfully by copy/pasting the message to a document and printing from there. I know that is very inconvenient and we will have it fixed soon.
UPDATE - this is now fixed and should be working fine.