Headline is incorrect. Zuckerberg wanted to meet with John Podesta while he was on a trip to the area. No mention of meeting at any Clinton campaign office. In fact the last message in the thread was an attempt to arrange a meeting time at Facebook campus.

Even if the title was suppose to be "wanted to meet with Clinton campaign". This is not necessarily accurate either. Zuckerberg did want to meet with John Podesta, but nothing indicates it was in reference directly to his role in the Clinton campaign. Zuckerberg has been more than willing to cross party lines to push his agenda, one I don't necessarily wholly agree with, and I imagine invitations of this sort went out to those experienced in creating political organizations across both parties.

The headline is phrased to attempt to imply a connection between Facebook and the Clinton campaign which the linked to email does not support.