Postage Warden: Media Mail rules for Shopify stores

For bookshops, record stores and anyone who ships media alongside other goods. Postage Warden offers USPS Media Mail at checkout only when every item in the box qualifies, so a tote bag or a mug can't ride along at the media rate.

What it does

• Checks every shipment at checkout: if each shipped item is eligible and the box is under the weight limit, Media Mail stays. If anything else is in the box, Media Mail is hidden for that shipment and your other rates stay as they are.
• You decide what's eligible: by product tag, by product type (Book, Vinyl, CD, Sheet Music...) or one product at a time. Blocked tags always win.
• Catalog check: lists every product's status and flags likely mistakes, like comic books, blank journals and magazines with ads.
• Weight limit and clearer wording: hide Media Mail above a weight you choose (USPS allows up to 70 lb) and optionally rename the rate, for example "Media Mail (books and records only, 2-8 business days)".
• Runs inside Shopify checkout as a Shopify Function: no theme code, no storefront scripts. Gift cards and digital downloads are ignored automatically.

Plans

$5.99 every 30 days or $59 a year, with a 14-day free trial. Every feature on both plans. Billed by Shopify; switch or cancel any time on the Plan page.

Private by design

Postage Warden stores no customer information. Your settings live in your own Shopify store; our server keeps only the login session Shopify needs. No analytics, tracking or ads. Read the privacy policy and terms.

Questions: hello@frontporchpuzzlepress.com

Shopify is a trademark of Shopify Inc. Media Mail and USPS are trademarks of the United States Postal Service. Postage Warden is not affiliated with or endorsed by Shopify or the USPS.