The Best Mail Alert Flag of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Mail Alert Flag of 2025. Check our ranking below.
2,276 Reviews Scanned
Rank No. #1
Otoolling Mailbox Delivery Notification Alert Signal Flag Kits Mailboxes Accessories with Flag Assembly, Wrench, Spacer, Flat Washer, Screw, Lock Nut for Traditional Steel Residential Mailboxes
- You Will Receive: a set of mailbox delivery notification alarm signal sign parts, including flag assembly, wrench, flag spacer, screw, flat washer, lock nut; You need to install it yourself, product does not include a mailbox
- Quality Material: the mailbox alert is made of quality plastic material, which is sturdy and thick and can be applied for a long time; The mailbox alarm is easy to install and will not take up a lot of your time
- Size Information: the size of the mailbox alarm after assembly can reach about 32cm/12.60 inches; The bright yellow color is very eye catching, the mailbox alarm sign will tell you when the mail arrives; You no longer need to go out repeatedly in the cold or rain to check whether the mail has appeared
- Practical Sign: with this mail warning flag, you don't have to waste time running to the mailbox; The bright yellow sign will tell you when the mail arrives, just observe the sign to know whether there is mail
- Save Electricity: no batteries or electronics needed, suitable for traditional style steel residential mailboxes; Please verify whether the mailbox is suitable before purchasing
Rank No. #2
Mail Tattle-Tail Mail Alert Flag
- Mailbox alert flag tells you when the mail has arrived.
- Never make another wasted trip to the mailbox!
- All aluminum construction with stainless steel hardware included. MADE IN USA!
- Powder coat painted yellow for high visibility.
- When the MAIL Tattle-Tail is up, the mail is there!
Rank No. #3
Mailbox Delivery Notification Alert Signal Flag
- Flag automatically rises when door is opened
- Never make another wasted trip to the mailbox
- Easy installation
- Made in U.S.A.
Rank No. #4
Yaocom 2 Sets Mailbox Alert Flag for Delivered Mail Mailbox Delivery Notification Alert Signal Flag Replacement 16.4 Inch Aluminum Alarm Heavy Duty Accessories for Steel Metal Post-Mount
- Follow the steps: 1: Includes mailbox flag and bolts (mailbox not included); 2: Simply drill holes in the side of the mailbox and bolt it to the mailbox; 3: When you see the mailbox flag being raised, then your mail has arrived
- Note: suitable for single-wall mailbox design, such as standard, large and giant iron box; not applicable to double-wall mailbox (integrated plastic mailbox)
- Size: the overall size of the mailbox alert for delivered mail is about 16.4 x 2 x 1.1 inches, which is long enough to secure your mailbox
- Trustworthy Quality: mailbox flag is made of quality aluminum material, strong and stable, and mail alert flag is yellow powder coated for high visibility; Suitable for any weather and works with most mailboxes
- Mailbox Flag Replacement: you will receive 2 sets of mailbox alert, which are enough for your daily use and replacement, suitable for most mailboxes, and you can also share with your friends or family
Rank No. #5
1 Pack Mailbox Notification Device, Mail Arrival Indicator Device, Mailbox Alert Alarm for Delivered Mail
- Mailbox Notification Device: This mailbox alarm is a indicator that attaches to the outside of your mailbox that visually alerts you when you have mail, keeping your mailing system efficient and visible. You don't have to walk all the way to the mailbox to see if mail was delivered, especially in winter
- Noticeable Yellow Ball: Updated bright yellow golf ball could provide a visibility at distances of around 200 ft
- Strong Adhesive: Mail arrival indicator device featuring 3mm Extreme Outdoor Mounting Tape which can sticks securely to flat, smooth mailbox surfaces without the need for tools, you can also used screws to attach to mail box for more stable attachment. (screws not include)
- Easy to Use: Mailbox alarm for delivered mail compatible with various mailbox accessories, it's the perfect fit flag for mailboxes, Besides, it doesn't need batteries or electronics, effectively reduce maintenance costs
- Installation Position: Attached mailbox alert to your mail box using 3mm thick industrial double sided tape, NOTE: Please make sure to stick mailbox alert for mailbox to the position where the yellow ball will bounce up higher than the mailbox when the mailbox opening, then it can notice you the mail comes. After you read the mail, place the spring back in the latch with the ball touching the door
Rank No. #6
Mail Alert - Mail Arrival Indicator Device - Mailbox Alert
- Mailbox Maide is a mechanical indicator that attaches to the outside of your mailbox that visually alerts you when you have mail.
- No batteries or electronics needed. It will fit most mail boxes providing the ball touches the face of the mailbox door, when your mailbox door is opened, it pushes the ball and spring out of its latch and sticks up higher than the box. To reset, place the spring back in the latch with the ball touching the door.
- You may paint the L bracket to match your mailbox color. The bright colored ping pong ball can easily be seen at distances greater than 150 ft. It is attached to your mail box using 3M industrial double sided tape, no modifications to the mailbox needed.
- NOTE: MAILBOX TEMPERATURE MUST BE 60F or more for installation, however the unit is able to handle temps from -20F to +190F.
- MAILBOX NOT INCLUDED.
Rank No. #7
Mail Alert LH
- Easy Installation using 3M VHB adhesive and attachment screw, locate the base bracket on the mailbox, mark the location with a pencil, lightly sand the area with the included sand paper, wipe the marked area clean with the included alcohol swab, let dry, remove the protective film, place the bracket in the marked area and hold for 10 seconds, install the drill-tip screw thru the bracket into the mailbox.
- When the mailbox door is opened, the spring and ball pop up allowing you to see when mail has been placed in the mailbox. To reset, place the spring back into the bracket cutout. No batteries needed.
- Weather Resistant heavy duty plastic for the base and ball and stainless steel screw and spring stand up to any weather condition (snow, wind, rain, sun)
- MAILBOX NOT INCLUDED
- Fits as shown ROUND TOP style mailbox, INSTALLATION DURING COLD WEATHER: I HIGHLY RECOMMEND USING THE OPTIONAL SCREW WITH THE 3M TAPE
Rank No. #8
Mail Alert RH
- Easy Installation using 3M VHB adhesive and attachment screw, locate the base bracket on the mailbox, mark the location with a pencil, lightly sand the area with the included sand paper, wipe the marked area clean with the included alcohol swab, let dry, remove the protective film, place the bracket in the marked area and hold for 10 seconds, install the drill-tip screw thru the bracket into the mailbox.
- When the mailbox door is opened, the spring and ball pop up allowing you to see when mail has been placed in the mailbox. To reset, place the spring back into the bracket cutout. No batteries needed.
- Weather Resistant heavy duty plastic for the base and ball and stainless steel screw and spring stand up to any weather condition (snow, wind, rain, sun)
- MAILBOX NOT INCLUDED.
- Fits ROUND TOP metal style mailbox ONLY - see product pictures
Rank No. #9
YeeBeny Mailbox Flag with Bright Red Background - Outgoing Mail Post Flag Sign Alert Magnet, 1.57x2.36 Inch
- Mailbox Flag: The magnetic outgoing mail used to remind the pickup sign is only affixed to the metal mailbox, Rectangle magnet with a "Please Pick Up Mail" to kindly show your mailman or mail woman that you have mail in your mailbox that you would like them to pick up.
- Material: Combination of silicone and magnet.
- Advantages: There is a strong magnetic magnet behind this product, which has the advantages of aging resistance, no deformation, no falling, long service life, and No installation required, simply stick to metal mail box.
- Measures:2.36 x 1.57 x 0.27 inches, this simple designed mailbox flag mounts easily on of your mailbox, No Tools Required, Fits Any Mail Box.
- Recommended: For best results, wipe the surface of your mailbox clean of dirt & debris before applying your new magnetic mailbox flag.
Rank No. #10
Mail Alert STEP2
- Easy Installation using 3M VHB adhesive and screws, mark the location on the box, wipe with included alcohol swab, peel protective film off the 3M tape, press the bracket within the markings, insert and tighten the included screws. The 3M adhesive helps hold the Mailbox Maide in place and acts as a gasket for when you install the screws to hold the unit in place.
- When the mailbox door is opened, the spring and ball pop up allowing you to see when mail has been placed in the mailbox. To reset, place the spring back into bracket. No batteries needed.
- Weather Resistant heavy duty plastic for the base and ball and stainless steel screws and spring stand up to any weather condition (sun, wind, rain, snow)
- Mailbox NOT Included
- Fits STEP2 style mailbox ONLY
Last update on 2026-01-19 / Affiliate links / Images from Amazon Product Advertising API
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- Specifications: How powerful they are can be measured.
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- Customer Ratings: Number ratings grade Mail Alert Flag objectively.
- Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Mail Alert Flag.
- Product Quality: You don’t always get what you pay for with an Mail Alert Flag, sometimes less, and sometimes more.
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