When sending email through a mail client (thunderbird) I get this error: Server Certificate Expired "plesk" is a site that uses a security certificate to encrypt data during transmission, but its certificate expired on 2/24/2005 2:19AM. You should check to make sure that your computer's time (currently set to Saturday, April 02, 2005 13:41:02) is correct. Would yu like to continue anyway? here is a screen shot: If i hit ok it will continue and send the message but this has got to be annoying for my customers. I cannot figure out what certificate it is talking about here.