You might call it a canned response, where can is a reference to mass-produced products delivered in tin cans - there is no customisation of its (standard) content once the can is sealed.

The sender might have several canned responses to choose from, but each canned response is a standard reply that isn't tailored to any circumstances.

Canned responses could potentially carry useful information - they are just standardised. If you want to stress the absence of useful information, you might call it a generic reply (see definition 1b: "lacking specificity").

You might call it a canned response, where can is a reference to mass-produced products delivered in tin cans - there is no customisation of its (standard) content once the can is sealed.

The sender might have several canned responses to choose from, but each canned response is a standard reply that isn't tailored to any circumstances.

Canned responses could potentially carry useful information - they are just standardised. If you want to stress the absence of specific information, you might call it a generic reply (see definition 1b: "lacking specificity"). If you want to go further and stress the lack of useful information, I suppose you could call it a useless reply. A jaded cynic might say they just received the party line.

You might call it a canned response, where can is a reference to mass-produced products delivered in tin cans - there is no customisation of its (standard) content once the can is sealed.

The sender might have several canned responses to choose from, but each canned response is a standard reply that isn't tailored to any circumstances.

You might call it a canned response, where can is a reference to mass-produced products delivered in tin cans - there is no customisation of its (standard) content once the can is sealed.

The sender might have several canned responses to choose from, but each canned response is a standard reply that isn't tailored to any circumstances.

Canned responses could potentially carry useful information - they are just standardised. If you want to stress the absence of useful information, you might call it a generic reply (see definition 1b: "lacking specificity").