This package provides the \makeenvelope command, which draws a layout for folding the first page of a letter into its own envelope, filled in with both recipient and sender addresses.

The package also provides an estimation of the total letter’s mass to foresee the stamping rate, and can print a digital stamp on the envelope.

It can be useful when running out of envelopes, or to spare a little of paper (especially when letter is an odd number pages long). It can also help implementing a (somewhat ”poor man’s”) automated batch letter
generating system.

This package is provided under GNU General Public Licence v3 (https://www.gnu.org/licenses/gpl-3.0.en.html), or any later version.