The only network that truly goes everywhere
Correos de México's defining asset is its universal service mandate: post offices and rural carriers reach municipalities and communities that no private courier network serves directly. When the delivery address is a small town in the Oaxaca sierra or a rural rancheria in Chiapas, the choice often isn't between carriers — it's between the postal service and nothing direct at all.
For senders, that makes SEPOMEX the coverage backstop in any Mexican shipping strategy: private carriers for the metropolitan map, the post for the long tail your checkout page shouldn't have to refuse.
Honest expectations: what cheap and slow buys you
The trade is explicit: rock-bottom pricing against multi-day-to-multi-week transit and tracking that records milestones rather than live location. Registered service (Servicio Registrado) adds proof of delivery; EMS adds genuine expedited handling and international tracking through the postal EMS network. Choosing well means matching cargo to product — replacement documents, printed matter, low-value merchandise, and non-urgent personal parcels ride happily; anything a buyer refreshes tracking for hourly does not.
Sellers using the post for low-value e-commerce should set delivery-window expectations at checkout in plain language. The complaint pattern with postal shipping is almost never loss — it's unmanaged expectations meeting a three-week rural journey.
ℹ️ EMS is the postal network's express lane: faster handling, end-to-end tracking, and access to 100+ countries through partner posts — at prices that still undercut private express for light international parcels.
International economy: the postal advantage for light goods
Outbound, the postal network's structural advantage is weight-based pricing that stays reasonable where courier rates climb steeply — small, light, low-value international shipments. Craft sellers, philatelic and collectible traders, and families sending small goods abroad get international reach through the destination country's own postal system, including delivery to PO boxes couriers can't service.
The paperwork is the standard postal customs declaration (CN22 for low values), and patience is part of the price. For the category of shipment where a courier quote exceeds the goods' value, the post remains the rational lane.
Apartado postal: the address that never moves
A distinctly postal service the couriers can't replicate: the apartado postal, a rented PO box at a post office that gives individuals and small businesses a stable receiving address independent of where they live or work. In cities where informal addressing complicates deliveries — or for home businesses that prefer not to publish a residential address — the apartado is the traditional answer, and only the postal network delivers to it.
For senders, the rule is simply awareness: an apartado postal address routes exclusively through Correos de México, so a checkout that accepts PO-box-style addresses needs a postal shipping lane behind it. Courier labels addressed to an apartado bounce; postal ones arrive.