Mailtronic is the only mail house in South Africa with on-site envelope manufacturing capabilities. From standard DL and C4 formats to fully custom window designs, we produce the envelopes your campaign needs — faster, cheaper, and to a higher standard than any external supplier.
Most printing companies and mail houses rely on external envelope suppliers — which means extra lead times, higher mark-ups, and a loss of quality control at a critical point in the production chain. Mailtronic eliminated that dependency entirely.
By manufacturing envelopes on our own premises in Johannesburg, we maintain complete oversight of the process from raw paper to finished, folded, and glued product. Every envelope is produced to meet the precise specifications of the campaign it will serve — whether that means a specific paper weight, a particular window position, or a custom printed outer with your brand's colours and messaging.
For campaigns with tight deadlines or unusual specifications, this capability is transformative. We are not waiting on a supplier's production schedule or minimum order quantities. When you need 500 000 window envelopes in a specific size to accommodate a redesigned statement layout, we can respond immediately — because the factory is right here.
This is not an incremental advantage. It is a structural one — and it is why organisations with high-volume, time-sensitive mailing requirements consistently choose Mailtronic over any other South African mail house.
Removing the external supplier from the equation means we can turn around custom envelope orders in a fraction of the time it would take elsewhere. Your campaign does not pause while envelopes are sourced, delivered, and inspected — production runs continuously, in sequence, from our floor to your fulfilment.
When the envelope manufacturer and the mail house are the same business, the mark-up between the two disappears. Clients who have moved to Mailtronic from competitors using external envelope suppliers regularly report significant cost savings — particularly at volumes above 50 000 units per run.
Our quality control team monitors envelope production in real time against the campaign specification. Seam strength, window sizing, glue application, and print registration are verified at the source — before a single envelope reaches the inserting line.
From standard postal formats to fully bespoke sizes, our manufacturing capability covers the full spectrum of commercial and direct mail requirements.
The workhorse of direct mail and statement mailing. Accommodates an A4 sheet folded in thirds, making it the standard format for letters, invoices, account statements, and personalised direct mail inserts across all industries.
Accommodates an A4 sheet folded once. Ideal for bulkier correspondence, multi-insert packs, and A5 booklets or brochures. Widely used for financial statements, government benefits letters, and educational correspondence.
Takes an A4 sheet flat, with no folding required. The preferred format for documents that must arrive uncreased — legal correspondence, application forms, government certificates, prospectuses, and high-value marketing packs.
Window envelopes allow the recipient's name and address to show through from the inserted document, eliminating the need for separate outer printing. Available in single-window and double-window configurations for address and return address display simultaneously.
Envelopes with branded full-colour or spot-colour printing on the outer face. Used to increase open rates by establishing brand identity before the recipient even reaches for the flap. Teaser copy, campaign messaging, and return addresses can all be incorporated.
When a standard size does not suit your insert dimensions, we manufacture to your exact specification. Custom-sized envelopes for product samples, thick inserts, non-standard booklets, or premium direct mail packs — all produced on-site with no minimum order penalties.
When the envelope manufacturer and the mail house are the same business, coordination becomes effortless. Your envelope specification feeds directly into the inserting line setup — no briefing a second supplier, no chasing deliveries, no misaligned window positions discovered at the last moment.
Eliminating the inter-supplier lead time means we can get your campaign into the post days sooner than a mail house dependent on an external envelope supplier. For time-sensitive communications — such as renewal notices, payment reminders, or event invitations — this speed advantage is measured in response rates.
Because we produce the envelope to fit your insert — not the other way around — there is never a mismatch. Window position, flap type, paper weight, and sealing mechanism are all specified to complement your campaign materials precisely, resulting in a more professional finished product.
Our in-house envelope manufacturing serves the full spectrum of South African business and government — anywhere a professional, reliable, high-volume envelope solution is required.
Monthly bank statements, credit card correspondence, loan agreements, and regulatory disclosures all require envelopes that handle high-speed inserting reliably. Our DL and C5 window envelopes are production-line proven for financial services at scale.
Official government correspondence — from Home Affairs identity notices to SARS tax assessments and NSFAS benefit letters — demands envelopes that convey authority and integrity. Our government-grade envelopes meet the exacting standards of public sector communications.
Retail promotions, insurance renewal campaigns, loyalty programme communications, and consumer acquisition mailers all benefit from custom-specified envelopes that maximise open rates and protect inserts during transit across South Africa's postal network.
Student acceptance letters, results notifications, bursary correspondence, and SETA training documentation are distributed in our C5 and DL envelopes — produced in bulk, on time, and to the volume requirements of large educational institutions and government bodies.
No other South African mail house produces its own envelopes in-house. This unique capability has been a core part of Mailtronic's offering since our founding and remains a decisive competitive advantage for high-volume clients.
Our manufacturing facility is centrally located in Johannesburg, providing efficient logistics access to all nine provinces. Bulk envelope orders can be shipped nationwide or fed directly into our own inserting and fulfilment operation.
Mailtronic's full Broad-Based BEE compliance status means your procurement of envelope manufacturing services contributes directly to your organisation's B-BBEE scorecard under the Enterprise and Supplier Development pillar.
Whether your requirement is 5 000 branded envelopes for an executive mailing or 5 million window envelopes for a national statement run, our production capacity scales to match without compromising turnaround time or quality.
Our manufacturing capability extends across a comprehensive range of technical specifications. Whether you need a specific paper stock, sealing mechanism, window film type, or outer print configuration, our technical team will advise on the optimal specification for your application and produce a confirmed specification sheet before production begins.
80gsm standard to 120gsm premium. Heavier stocks available for luxury or executive mailings where tactile quality forms part of the brand experience.
Self-seal (peel and stick), gummed (lick-and-seal), and machine-seal configurations available. High-speed inserting lines favour self-seal for maximum throughput.
Clear, frosted, and glassine window films. Single and double window configurations. Window position customisable to align with your insert layout specification.
Mono, spot colour, and full-colour outer print. Teaser copy, campaign branding, return address, barcodes, and postal indicia can all be incorporated into a single production step.