Re: bah, humbug, and it's the 60s, not the 70s.
There comes a point in any email where you have to stop worrying who you might be inadvertently excluding. If you're non-binary, should you feel offended by not being mentioned or considered in this email? Well not any more than amputees, both those without fingers and/or feet, those with a high tolerance for heat, those suffering hot flushes, those with a phobia about emails, those who do not drink alcohol, those who have strict dietary restriction that make social functions a minefield, those socially anxious who hate functions, those who are house bound and cannot attend, and those who must return to their kidney dialysis on Tuesday evenings. All of these individuals are totally ignored, without a second's consideration, by this email.
All these people are different from most others. They know they are different. Sometimes that sucks. But they don't demand that the rest of us must forever look out for instances where we are not acknowledging they are different. Otherwise it would become almost impossible to say/write anything without constant caveats and qualifications.
Please note that when I write "say", I mean to communicate in some form, and am in no way excluding those of the mute community or those who, through personal belief, choose to not speak. And when I write "write", it is not my intent to exclude those who are illiterate.