We're both in senior positions.
He calls me 'dude' or 'mate' in emails (manages 'dear' and 'regards'if others are cc'ed), or signs off with various silly comments/ text speak. He doesn't take the hint that I'm always formal
He texts if he needs to contact outside work, rather than ring my landline (he only has my mobile number because I used it once at work out of necessity).
So, am I uptight and old-fashioned? I just find it rude and disrespectful, or do I need to get with the times?
Just opening emails and I seethe each time (inside). I get the odd 'dude' to my face.