Can I add real stamps to the outer envelopes of my mailings?
When you send mailings through LetterStream, by default we use a permit that the USPS recognizes to be specific to us. What this means in simpler terms is that we do not need to include real, physical stamps on your mail to send it out.
You can, however, opt to include physical stamps on the outer envelopes of your mailings for an extra fee.
If you are wanting to add live stamps to your envelopes, simply click the 'Job Options' button on the 'Job Inserts Review' page and check the box where it says "Live Stamps on Outer Envelope":