Error: Checksum mismatch at 0 of 20

Question: This error might occur in Outlook when trying to send an encrypted mail to a person that is not yet using REDDCRYPT.

Solution: The following steps are required as a work around until the problem is solved with a new addin:

1. Delete the REDDCRYPT Account in the REDDCRYPT Addin Settings
2. Close Outlook
3. Delete the file accounts.json that is locatet at %appdata%\REDDOXX\REDDCRYPT for Windows\Common
4. Start Outlook and add your existing Account in the REDDCRYPT Addin