I'm administrating a web, ftp and mail server for my company, using ISPconfig 3 (on a ubuntu 9.10 box). i didn't change much of the settings related to emails. Sometimes i get a INVALID HEADER in mail TO YOU from .... email. I know it can be a spam but in this case i saw that i wanted that email. It's a activation link for a site. Is there any way to access that mail (as the mailbox owner or the server admin)?