Today I received two (make that four now – must sort out my spam filters) phishing emails from a source new to me. Each email purported to come from “linkedin” and each invited me to login to respond to “invitations from your work colleague”. Since a) I have never been a member of linkedin, and b) am retired, the invitations immediately looked suspect, but the return address looked real at first sight. That is, until I looked more closely. The actual address used was linkedln.com (with a second letter “l”) rather than the correct linkedin.com.