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Architectural Mailboxes

Model # 5100B

Internet # 100041045

Oasis Post-Mount or Column-Mount Locking Mailbox in Black with Outgoing Mail Indicator

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$171.00 /each




Model # 5100B

Internet # 100041045

Store SO SKU # 426672

Architectural Mailboxes Oasis Post-Mount Locking Mailbox is ideal for receiving mail and small parcels, making it great for catalog and internet shoppers. Rubber seals on the doors help keep deliveries clean and dry. The powder coating helps this mailbox stand up to most weather conditions and helps maintain an attractive appearance. The stainless steel cam lock provides a secure access door for extra protection and includes 2 keys.

  • Hopper door for convenient delivery of small parcels and mail bundles
  • Access door locks with stainless steel cam lock for increased security (includes 2 keys)
  • Constructed of heavy 16 and 14-gauge galvanized steel for durability and longevity
  • Rubber seals are included on doors to help keep deliveries clean and dry
  • Outgoing mail clip installed discretely inside hopper door
  • Galvanized steel body has been fully powder coated prior to assembly for added corrosion resistance
  • Entire outer shroud is made of 1-piece to resist moisture
  • Approved by the US postmaster general
  • Use universal adapter plate 5530B for 4 x 4 wood post installation
  • Item weight is 36.5 lb.

Info & Guides

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Assembled Depth (in.) 
18.50 in 
Assembled Height (in.) 
20 in 
Assembled Width (in.) 
13.7 in 
Assembly Required 
Color Family 
Hardware Finish Family 
Letters/numbers included 
Mailbox Size 
Galvanized Steel 
Newspaper receptacle 
Outgoing mail indicator 
Rear access 
Single Box Type 
Post Mount 
Warranty / Certifications
Manufacturer Warranty 
One Year Limited Warranty 
U.S. Postmaster General approved 


Rated 4.8 out of 5 by 43 reviewers.
Rated 5.0 out of 5.0 by this mailbox is great. I had no problems putting it into my brickwork mailbox. This mailbox is built very well and is easy to incorporate into my brick mailbox stand. November 7, 2012
Rated 5.0 out of 5.0 by The Mother of All Mailboxes Completely over my mail theft paranoia. Neighbors envious. And weirdly, I think my USPS lady has a mild crush on me. Super sturdy, simple assembly, ample space. If I am going away for a few days do not need to ask the neighbors to pick up and hold for me. Really great product for strange times. August 12, 2015
Rated 5.0 out of 5.0 by Very large mail box for rural areas Mailbox has very sturdy construction, since we live in the Sierra's, it needs to be weather proof which it has been so far. Box has an attractive finish that looks like it can take many years of service. Order the steel pole with it and it can be partially filled with concrete making it a battleship. This box is postmaster approved. September 15, 2015
Rated 5.0 out of 5.0 by Great locking mailbox I used the matching metal post that you can buy for this mailbox and installed it myself. I mixed up a little cement as the instructions recommended for installing the post into the ground. The result is a very sturdy mailbox that is very high quality. It is very solid and the doors have a high quality feel when opening and closing. The doors also have rubber seals on them to keep the moisture out. My mail is kept clean, dry, and secure. It is the best mailbox that I have ever owned. May 12, 2006
Rated 5.0 out of 5.0 by Privacy & Security This mail box is big!! It is able to fit a lot of mail and is an absolutely great design. No one can reach in and get your mail because of the drop slot. It is a great mailbox and would definetely recommend to anyone who wants that extra security from mail thieves. January 19, 2007
Rated 5.0 out of 5.0 by Oasis mailbox This mailbox is well built and functions well. One of the best products I've purchased in some time. Size is just right for a small business. July 28, 2015
Rated 5.0 out of 5.0 by Rivergirl We are very satisfied with the Oasis Mailbox and our Postman loves it. The mail delivery bin opening allows easy access for receiving multiple catalogs, prescription orders and packages saving our postman a trip to the door. The style is non assuming so as not to draw too much attention to the mailbox which is also a plus. January 18, 2007
Rated 4.0 out of 5.0 by Great Product Due to mail-theft in the area we decided to purchase a secure mailbox. The smaller version of this mailbox that is sold in stores was really just too small. This version is the perfect size. The only reason this product didn't get 5 stars in my review is that the key sticks in the lock occassionaly and at times I have to fight with the lock to get the key into it. Otherwise, great product. January 19, 2007
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