How are envelopes handled USPS I have a rigid item I plan on shipping in an envelope will that be safe?

When shipping with USPS, envelopes are typically processed through automated machines, which can apply significant pressure. If you're sending a rigid item in an envelope, it's crucial to use a padded or rigid envelope designed for such items to minimize the risk of damage. However, even with proper packaging, rigid items can still be vulnerable during transit. For valuable or fragile items, consider using a box for added protection.