We were facing a postal strike a few years ago. The negotiating was breaking down and the deadline nearing.
I gave a gift card and a note telling them I hoped everything worked out.
Got a thank you note. I think the gesture and kind words was much appreciated.

They are not allowed to accept gifts from patrons.

No. I do not think it's appropriate as that occupation is not tip dependent, like wait staff, et al.

No.
I don't get gifts for the guys who pick up the trash, either.

We don't tip in the UK.

It's nice help out your fellow man or woman. However, the mail carriers make like 6 to $10 more than I do. Why do you think a book of 20 stamps is $10.

PO BOX

I usually get him a gift card from the Subway near our house because he delivers mail around lunch. and can stop in to get a bite to eat before doing more deliveries. I do it because he puts my packages inside my garage and he once brought my dog home when he wandered out of the yard. It's not a lot, just a gesture of thanks.

I always think about it, but, by the time I'm done getting presents for the family, all I have left is enough to by him Snickers bar, the small size one.

I don't know how much they make. However, I have left a gift in the past but not currently. I now have a PO Box and they don't deliver.

Do you?

No, without comment. I don’t know whether they make enough.

Well, I suppose I’ll kick it off. Mail carriers in my state make $17.50 an hour starting off. Which is almost $8.00 more an hour than what I make. I’m still polite to them and greet them most days though.