ok here is the error message i am getting when sending an email to my yahoo account from my work server, the same work email account is able to receieve emails from outside the domain: The following recipient(s) could not be reached: 'harel_zahavi@xxxxxxxxx' on 9/6/2002 5:30 PM There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <Server1.LVI-Domain #5.5.0 smtp;551 Not a valid mailbox> also if anyone knows the requirements to be able to access my work mail via pop3 or imap4 on my server from another location (ie from my house where i have my own internet connection) that would be most appreciative