USPS is testing whether it can change the timing of Marketing Mail delivery at addresses that have no First-Class Mail for a particular day. The National Postal Mail Handlers Union posted the announcement September 21, along with a September 17 USPS Labor Relations letter describing the test.
The proposal is called Marketing Mail Optimized Delivery, or MMOD. Its importance is the connection between the mail mix at an individual delivery point and when certain pieces are delivered. The published letter sets a narrow scope; it does not announce a nationwide change to the delivery week.
What the notice actually authorizes for the test
USPS says the test focuses on particular circumstances in which a delivery point receives no First-Class Mail that day. Marketing Mail for that address would be handled and processed with delivery deferred by a maximum of one day.
That description does not say all mail at the address can be held. It does not explain what happens when the same address has a parcel, a Periodical or another mail class. It also does not publish the detailed method employees will use to identify eligible pieces. Those operational questions require the actual pilot instructions.
Locations and dates
| Processing location | Test period | ZIP codes |
|---|---|---|
| Austin P&DC, Texas | September 21–October 16, 2026 | 78703, 78751 |
| Boston P&DC, Massachusetts | September 28–October 23, 2026 | 02128, 02129, 02152, 02143, 02144, 02145, 02149, 02150 |
As of September 24, the announced Austin test window has begun and Boston's is scheduled to start the following Monday. The notice does not report results or confirm a decision to expand the program.
Election Mail is specifically addressed
The USPS letter says specific steps have been implemented to keep Election Mail unaffected for the duration of the test. It does not spell out those steps in the public letter. Employees should therefore use the written identification and handling instructions supplied for their operation, rather than assume that every piece bearing a particular postage class qualifies for deferral.
The public-facing question is straightforward: how will USPS demonstrate that protected mail was excluded and the one-day limit was followed? A useful follow-up would examine actual handling records and service results, not just whether total workhours went down.
What could change for employees?
MyPostalPay analysis: Deferring mail can move work between days and between processing and delivery operations. It may reduce some delivery activity on one day while increasing preparation or delivery work on the next. Any evaluation should account for the complete operation, including the effort needed to separate, retain and release eligible mail.
For carriers, the question is whether the test changes the actual time needed to serve a route. For clerks and mail handlers, it is how the mail is identified and moved through the operation. For supervisors, it is whether staffing and service expectations reflect the resulting daily workload. These are questions to measure; the announcement does not supply answers or a quantified savings claim.
What employees outside the test should do
The listed locations and dates define this announcement. An employee elsewhere should not treat it as permission to hold Marketing Mail locally. Participating employees likewise need the instructions for their assigned operation, including the exception process when eligibility or release timing is unclear.
The next meaningful developments will be test results, any extension of the published dates, and any formal proposal for additional locations. Until then, this is an operational trial whose outcome remains open.
Sections labeled MyPostalPay analysis are editorial interpretation, not an announcement by USPS or a union.