What does this mean - sudo: no tty present and no askpass program specified?

Hello,

I suggest first running the following commands:

sudo visudo

Then add the following at the end of the file.

< Your Username > ALL=(ALL) NOPASSWD: ALL

If that does not work, check and see if a particular job is sending out the mail.

Then add the NOPASSWD to the file or application the job is calling.

username (or application) ALL = NOPASSWD: /fullpath/to/command

Please note that this fix will remove the prompt for a sudo password, thus lessening the security on your server.