No one-click unsubscribe? It's spam.
Linked-In has the spammiest email protocol out of any service I have ever used.  <i>Even after signing-in</i> there is no one-click-to-unsubscribe button (they split it into about 12 scattered categories), and they create new categories periodically and opt you in to them.  This is downright deceitful.  <i>Pro tip</i>: change your email to one that you never use.  It literally came down to doing this or deleting my Linked-in account--unfathomable to me.  Also: no more f@#$!ng emails at 4 in the morning.  This seems like a jackpot CAN-SPAM class action suit.<p>@easternmonk: <i>That's the thing</i> -- I did mark them as spam in GMail.  I assumed it would block future emails from Linked-in but not the case. ... Somehow they continued to come in.<p>@sehugg:  That too! I complained about their this on Facebook and I had friends (<i>yes, plural</i>) who had deleted their account because of the spam and yet were still receiving it.  Unbelievable