# Stuck at Postfix Configuration during Lambda Stack install

Dear Lambda folks & community,

As part of the installation process and ancient error appears when the in-terminal dialog for “Postfix Configuration” describing mail server configuration type (?!?) options is not responsive to keyboard input. Arrows get typed as ^[[B, etc and nothing happens on Tab or Enter. There is no way to select an option or the Ok “button”. This error is more than 15-years old and Tab+Enter has worked for some, but not for me.  
This is an absolutely silly error that is nevertheless blocking me because I need the Stack to use my GPUs. I have a fairly old QUAD workstation with 4x Titan V, and I just did a clean install of Ubuntu 24.04.  
I don’t want to kill the installation process because I have had lasting problems before from interrupted installs and inconsistent states.  
Please, advise!  
76 views

## post by ivogeorg on Mar 4, 2025

Adding I_AGREE_TO_THE_CUDNN_LICENSE=1 to the top of the installation script does it.

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