Britain's Royal Mail has released its first digital postage stamps and is aiming them at small firms.
The so-called SmartStamps can be bought over the Internet and printed directly on to envelopes from a desktop computer.
Businesses will be able to add their own logo designs to the envelope, which can be taken directly to postboxes.
Ms Alison White, Royal Mail's head of small business, said the service, which costs £49.99 a year to use, would suit people working from home or from a small office.