Free images results:
 

Snail Mail Greeting pictures, stock photos and images

 
1


 
 
1


 
Also, here are some commercial RF-licensed images that match your search criteria:  
Mail Stock Photos
Author: Py2000
Mail Stock Images
Author: Nikolaev
Mail Royalty Free Stock Photo
Author: Nikolaev
Mail Stock Image
Author: Nikolaev
Mail Stock Image
Author: Nikolaev
Mail Royalty Free Stock Photo
Author: Nikolaev
Mailbox Stock Photos
Author: Annnmei
Cards Stock Images
Author: Bloopiers
Envelope Stock Photography
Author: Py2000