Best site for printing/mailing direct mail postcards

[Brennan Butler]

Hi all, 

I have recently generated a list of ~600 properties to send direct mail to. I had a postcard design done on designcrowd and would like to get my first batch out. 

I have a custom design that I am happy with and would like to see who you use for printing postcards. Also, do you have yours shipped directly from printer or to you then you put in your mail locally?

Thanks!

Brennan