Error sending email with form values

Error sending email with form values

I'm trying to execute a very simple script:

sendmail
(
To : "<<emailaddress here>>"
From : zoho.adminuserid
Subject : "adding"
Message : input.Pre_Mass_1
)

But I get this error:

[Error]
Error details:
Error occured while executing on success script.
Unable to send email
Error on table null