IncaMail messages are stored encrypted on Swiss Post’s servers for 90 to 120 days, allowing you to open them quickly and easily with the "Read" button. They are then deleted. The "Read" button then no longer works, but the message (including attachments) can still be opened for at least two years with the attachment IncaMail.html, which can be found in the recipient’s IncaMail message, where it is also stored.
If large files are sent using IncaMail (large files up to 1 GB), they are stored in encrypted form for one week before being deleted. The recipient must download the files within this period.