My Outlook 2003 is behind ISA 2004 server. Every time I try to send an e-mail, I receive the error "Interface not registered". Has anyone seen this error before?
If I reply to some of my old e-mails, I do not receive the error. It only happens when I typed in a new e-mail address.
Now people don't seem to receive my e-mails when I reply to their old e-mails. Anyone seen the error before and how to resolve it? All searches on Microsoft, google and some other areas on the Internet have turned out to be negative. Thanks.