Does anyone know the locations where I can find the postman outfits and hats? I'm over 300hrs into the game but still plenty to explore due to a lot of time spent on settlements. I've so far only found 2 postman outfits and one hat. I like to use them for my provisioners. Can anyone help?

Open third levelclothes shops, saw the outfit there usually.

People collect funny things. Not sure where I found the set I have. Out of desperation for a boost in charisma while talking to father I had to wear the postman outfit because it was all I had at the moment. Having a serious conversation while wearing that was a bit humorous.

So far all the postman outfits I've found have been random loot I think.

Check clothing vendors, they might sell them occasionally.

Or you could try the dogmeat trick. Throw it on the floor, tell dogmeat to pick it up and grab it at the same time. (I know this works to duplicate the You're Special book.) The timing is a bit tricky to get right though.

If you're on the pc I'm sure there are easier ways.

Are there any post offices in the game?

I've seen dead mail carriers out in the wastland with full postman outfits and even undelivered letters to read. Go explore some more and fast travel less.

Down town Boston

I think I got one from a Jackpot (DIA) cache

Also found a full "set" in a DIA cache. Can also just check traders to see if they have any. There's a clothing store in Diamond City that I didn't even notice until I was level 50 with my second character.

I randomly found a Postman outfit and a day later a Postman hat.

Would gladly give it to you if it was possible :/

I think there is a bar in Boston and there is a letter carrier there. I have not been there but it is an easter egg to a long time tv show from the 80's

http://fallout.wikia.com/wiki/Postman_uniform

https://www.youtube.com/watch?v=A7-j1pCQBKE

Thanks for all the tips folks! Gonna check them all out tomorrow. Planning a whole day of wandering the wasteland in search of these going on your suggestions