If you see an smapisendmail error when trying to send documents as email attachments.

This means that RocketDMS is unable to use the mapi interface on your PC to request an email client start. Possible fix:

Outlook Express as your default email client: Run Outlook Express. Tools, Options menu. General tab. Click the Make Default button to make this application the default mail handler.

Thunderbird as your default email client: Run Thunderbird. Tools, Options menu. General tab. Click the Check Now button on the Tools, 'Always check to see if Thunderbird is the default mail client' section. Select E-Mail.